<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.lantheus.com/role/AssetRetirementObligations" xlink:href="lnth-20170930.xsd#AssetRetirementObligations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/AssetRetirementObligationsAdditionalInformationDetail" xlink:href="lnth-20170930.xsd#AssetRetirementObligationsAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/AssetRetirementObligationsSummaryOfChangesInCompanysAssetRetirementObligationsDetail" xlink:href="lnth-20170930.xsd#AssetRetirementObligationsSummaryOfChangesInCompanysAssetRetirementObligationsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/AssetRetirementObligationsTables" xlink:href="lnth-20170930.xsd#AssetRetirementObligationsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/BasisOfPresentation" xlink:href="lnth-20170930.xsd#BasisOfPresentation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/BasisOfPresentationPolicies" xlink:href="lnth-20170930.xsd#BasisOfPresentationPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:href="lnth-20170930.xsd#CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:href="lnth-20170930.xsd#CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/CondensedConsolidatedStatementsOfCashFlowsUnaudited" xlink:href="lnth-20170930.xsd#CondensedConsolidatedStatementsOfCashFlowsUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeUnaudited" xlink:href="lnth-20170930.xsd#CondensedConsolidatedStatementsOfComprehensiveIncomeUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/CondensedConsolidatedStatementsOfOperationsUnaudited" xlink:href="lnth-20170930.xsd#CondensedConsolidatedStatementsOfOperationsUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/DocumentAndEntityInformation" xlink:href="lnth-20170930.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/FairValueOfFinancialInstruments" xlink:href="lnth-20170930.xsd#FairValueOfFinancialInstruments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/FairValueOfFinancialInstrumentsScheduleOfInformationAboutCompanysAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetail" xlink:href="lnth-20170930.xsd#FairValueOfFinancialInstrumentsScheduleOfInformationAboutCompanysAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/FairValueOfFinancialInstrumentsTables" xlink:href="lnth-20170930.xsd#FairValueOfFinancialInstrumentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/FinancingArrangements" xlink:href="lnth-20170930.xsd#FinancingArrangements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/FinancingArrangementsAdditionalInformationDetail" xlink:href="lnth-20170930.xsd#FinancingArrangementsAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/FinancingArrangementsScheduleOfMaturitiesOfPrincipalObligationsUnderNewTermFacilityDetail" xlink:href="lnth-20170930.xsd#FinancingArrangementsScheduleOfMaturitiesOfPrincipalObligationsUnderNewTermFacilityDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/FinancingArrangementsScheduleOfTermFacilityFinancialCovenantDetail" xlink:href="lnth-20170930.xsd#FinancingArrangementsScheduleOfTermFacilityFinancialCovenantDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/FinancingArrangementsTables" xlink:href="lnth-20170930.xsd#FinancingArrangementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/IncomeTaxes" xlink:href="lnth-20170930.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/IncomeTaxesAdditionalInformationDetail" xlink:href="lnth-20170930.xsd#IncomeTaxesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/Inventory" xlink:href="lnth-20170930.xsd#Inventory" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/InventoryAdditionalInformationDetail" xlink:href="lnth-20170930.xsd#InventoryAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/InventoryScheduleOfInventoryDetail" xlink:href="lnth-20170930.xsd#InventoryScheduleOfInventoryDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/InventoryTables" xlink:href="lnth-20170930.xsd#InventoryTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/LegalProceedingsAndContingencies" xlink:href="lnth-20170930.xsd#LegalProceedingsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/NetIncomePerCommonShare" xlink:href="lnth-20170930.xsd#NetIncomePerCommonShare" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/NetIncomePerCommonShareSummaryOfNetIncomePerCommonShareDetail" xlink:href="lnth-20170930.xsd#NetIncomePerCommonShareSummaryOfNetIncomePerCommonShareDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/NetIncomePerCommonShareTables" xlink:href="lnth-20170930.xsd#NetIncomePerCommonShareTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/OtherIncomeExpense" xlink:href="lnth-20170930.xsd#OtherIncomeExpense" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/OtherIncomeScheduleOfOtherIncomeDetail" xlink:href="lnth-20170930.xsd#OtherIncomeScheduleOfOtherIncomeDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/OtherIncomeTables" xlink:href="lnth-20170930.xsd#OtherIncomeTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/PropertyPlantEquipmentNet" xlink:href="lnth-20170930.xsd#PropertyPlantEquipmentNet" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/PropertyPlantEquipmentNetAdditionalInformationDetail" xlink:href="lnth-20170930.xsd#PropertyPlantEquipmentNetAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/PropertyPlantEquipmentNetScheduleOfPropertyPlantEquipmentNetDetail" xlink:href="lnth-20170930.xsd#PropertyPlantEquipmentNetScheduleOfPropertyPlantEquipmentNetDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/PropertyPlantEquipmentNetTables" xlink:href="lnth-20170930.xsd#PropertyPlantEquipmentNetTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/RelatedPartyTransactions" xlink:href="lnth-20170930.xsd#RelatedPartyTransactions" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/RelatedPartyTransactionsSummaryOfRelatedPartyExpensesDetail" xlink:href="lnth-20170930.xsd#RelatedPartyTransactionsSummaryOfRelatedPartyExpensesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/RelatedPartyTransactionsTables" xlink:href="lnth-20170930.xsd#RelatedPartyTransactionsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/SegmentInformation" xlink:href="lnth-20170930.xsd#SegmentInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/SegmentInformationAdditionalInformationDetail" xlink:href="lnth-20170930.xsd#SegmentInformationAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/SegmentInformationScheduleOfSelectedInformationForEachBusinessSegmentDetail" xlink:href="lnth-20170930.xsd#SegmentInformationScheduleOfSelectedInformationForEachBusinessSegmentDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/SegmentInformationTables" xlink:href="lnth-20170930.xsd#SegmentInformationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/StockBasedCompensation" xlink:href="lnth-20170930.xsd#StockBasedCompensation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/StockBasedCompensationAdditionalInformationDetail" xlink:href="lnth-20170930.xsd#StockBasedCompensationAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/StockBasedCompensationScheduleOfStockBasedCompensationExpenseRecognizedDetail" xlink:href="lnth-20170930.xsd#StockBasedCompensationScheduleOfStockBasedCompensationExpenseRecognizedDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/StockBasedCompensationTables" xlink:href="lnth-20170930.xsd#StockBasedCompensationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/SubsequentEventsNotes" xlink:href="lnth-20170930.xsd#SubsequentEventsNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="lnth-20170930.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:href="lnth-20170930.xsd#SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.lantheus.com/role/SummaryOfSignificantAccountingPoliciesRecentAccountingPronouncementsTables" xlink:href="lnth-20170930.xsd#SummaryOfSignificantAccountingPoliciesRecentAccountingPronouncementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple" />
  <link:presentationLink xlink:role="http://www.lantheus.com/role/AssetRetirementObligations" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetRetirementObligationDisclosureAbstract" xlink:label="loc_us-gaap_AssetRetirementObligationDisclosureAbstract_C9C60C70D67D5209AE8CCBA0762B3563" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetRetirementObligationDisclosureTextBlock" xlink:label="loc_us-gaap_AssetRetirementObligationDisclosureTextBlock_565EA5915E095F41B2DA963627D64A9D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetRetirementObligationDisclosureAbstract_C9C60C70D67D5209AE8CCBA0762B3563" xlink:to="loc_us-gaap_AssetRetirementObligationDisclosureTextBlock_565EA5915E095F41B2DA963627D64A9D" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/AssetRetirementObligationsAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetRetirementObligationDisclosureAbstract" xlink:label="loc_us-gaap_AssetRetirementObligationDisclosureAbstract_609DFA7B4460CBB4B29E35F5D6FEB8AC" xlink:type="locator" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_FinancialAssuranceInFormOfSuretyBond" xlink:label="loc_lnth_FinancialAssuranceInFormOfSuretyBond_2CF9801C4224C1EDFF8335F5D6FEBFBD" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetRetirementObligationDisclosureAbstract_609DFA7B4460CBB4B29E35F5D6FEB8AC" xlink:to="loc_lnth_FinancialAssuranceInFormOfSuretyBond_2CF9801C4224C1EDFF8335F5D6FEBFBD" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_AssetRetirementObligationLiabilitiesExpectedPresentValue" xlink:label="loc_lnth_AssetRetirementObligationLiabilitiesExpectedPresentValue_07FD10C39C19858E6EB435F5D6FE8659" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetRetirementObligationDisclosureAbstract_609DFA7B4460CBB4B29E35F5D6FEB8AC" xlink:to="loc_lnth_AssetRetirementObligationLiabilitiesExpectedPresentValue_07FD10C39C19858E6EB435F5D6FE8659" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/AssetRetirementObligationsSummaryOfChangesInCompanysAssetRetirementObligationsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetRetirementObligationAbstract" xlink:label="loc_us-gaap_AssetRetirementObligationAbstract_63C37AF15DA30D42180B3680E338FA43" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward" xlink:label="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_5113B43AC9858344CBC33681339059F0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetRetirementObligationAbstract_63C37AF15DA30D42180B3680E338FA43" xlink:to="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_5113B43AC9858344CBC33681339059F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetRetirementObligationsNoncurrent" xlink:label="loc_us-gaap_AssetRetirementObligationsNoncurrent_115474057C739EA4F41A3681A47EE197" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_5113B43AC9858344CBC33681339059F0" xlink:to="loc_us-gaap_AssetRetirementObligationsNoncurrent_115474057C739EA4F41A3681A47EE197" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetRetirementObligationAccretionExpense" xlink:label="loc_us-gaap_AssetRetirementObligationAccretionExpense_2590FDEDDB377D82B8F63680E3BDB9E5" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_5113B43AC9858344CBC33681339059F0" xlink:to="loc_us-gaap_AssetRetirementObligationAccretionExpense_2590FDEDDB377D82B8F63680E3BDB9E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetRetirementObligationsNoncurrent" xlink:label="loc_us-gaap_AssetRetirementObligationsNoncurrent_4E6D90C3A92BE14C9CFE3680E38D3529" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetRetirementObligationRollForwardAnalysisRollForward_5113B43AC9858344CBC33681339059F0" xlink:to="loc_us-gaap_AssetRetirementObligationsNoncurrent_4E6D90C3A92BE14C9CFE3680E38D3529" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/AssetRetirementObligationsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetRetirementObligationDisclosureAbstract" xlink:label="loc_us-gaap_AssetRetirementObligationDisclosureAbstract_777B61F4715E3DA0F0ABE872DCCAEEC4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock_CB77C26847C518803638E872DCCBFB29" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetRetirementObligationDisclosureAbstract_777B61F4715E3DA0F0ABE872DCCAEEC4" xlink:to="loc_us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock_CB77C26847C518803638E872DCCBFB29" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/BasisOfPresentation" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_383F4E59CE885D2CB16509E745551DE1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock" xlink:label="loc_us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock_5D5C2CB71E87544C888C6B9EDCF3C4CC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_383F4E59CE885D2CB16509E745551DE1" xlink:to="loc_us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock_5D5C2CB71E87544C888C6B9EDCF3C4CC" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/BasisOfPresentationPolicies" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_E8ED48B90EFE6E5BD06DE872DD371090" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_C329DD400A9E651F86BAE872DD374DBD" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_E8ED48B90EFE6E5BD06DE872DD371090" xlink:to="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_C329DD400A9E651F86BAE872DD374DBD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_93313EBB26E01EBC8B1EE8B0D3D8A134" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_E8ED48B90EFE6E5BD06DE872DD371090" xlink:to="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_93313EBB26E01EBC8B1EE8B0D3D8A134" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_F0BDE6C6AF5D2B5DD6E3368682459129" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_7C777AC70C471DA9FB8036868245B88D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_F0BDE6C6AF5D2B5DD6E3368682459129" xlink:to="loc_us-gaap_AssetsAbstract_7C777AC70C471DA9FB8036868245B88D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_18A3E9A7A82BAB12A9F436868245E15D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_7C777AC70C471DA9FB8036868245B88D" xlink:to="loc_us-gaap_AssetsCurrentAbstract_18A3E9A7A82BAB12A9F436868245E15D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_94C749F0F96E009DB25836868245ED48" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_18A3E9A7A82BAB12A9F436868245E15D" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_94C749F0F96E009DB25836868245ED48" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_FBE0F358600E60930D983686824549F1" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_18A3E9A7A82BAB12A9F436868245E15D" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_FBE0F358600E60930D983686824549F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_1F9A0BCF1422E111DB883686824573CF" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_18A3E9A7A82BAB12A9F436868245E15D" xlink:to="loc_us-gaap_InventoryNet_1F9A0BCF1422E111DB883686824573CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_C1BEC08A49738FE03DD9368682456A42" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_18A3E9A7A82BAB12A9F436868245E15D" xlink:to="loc_us-gaap_OtherAssetsCurrent_C1BEC08A49738FE03DD9368682456A42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_C7D25532D8AF7F158C6A36868245CAF9" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_18A3E9A7A82BAB12A9F436868245E15D" xlink:to="loc_us-gaap_AssetsCurrent_C7D25532D8AF7F158C6A36868245CAF9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_985F288279DB0AFF5F46368682455F92" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_7C777AC70C471DA9FB8036868245B88D" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_985F288279DB0AFF5F46368682455F92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_F418A0703032510AB7DF368682451672" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_7C777AC70C471DA9FB8036868245B88D" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_F418A0703032510AB7DF368682451672" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_F188DC6927EC1C38BA5D368682457D25" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_7C777AC70C471DA9FB8036868245B88D" xlink:to="loc_us-gaap_Goodwill_F188DC6927EC1C38BA5D368682457D25" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_CD306F1669067AEBCDF83686824559F3" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_7C777AC70C471DA9FB8036868245B88D" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_CD306F1669067AEBCDF83686824559F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_22E75278736C0FE83F0536868245924A" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_7C777AC70C471DA9FB8036868245B88D" xlink:to="loc_us-gaap_Assets_22E75278736C0FE83F0536868245924A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_45BC62D23AC7922D9730368682452072" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_F0BDE6C6AF5D2B5DD6E3368682459129" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_45BC62D23AC7922D9730368682452072" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_3C198780EF0CD8CF266536868245CE43" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_45BC62D23AC7922D9730368682452072" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_3C198780EF0CD8CF266536868245CE43" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_C536F8B14FFB98A3CA44368682460940" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_3C198780EF0CD8CF266536868245CE43" xlink:to="loc_us-gaap_LongTermDebtCurrent_C536F8B14FFB98A3CA44368682460940" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LinesOfCreditCurrent" xlink:label="loc_us-gaap_LinesOfCreditCurrent_F49EF46AFF5102D344C736868246913F" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_3C198780EF0CD8CF266536868245CE43" xlink:to="loc_us-gaap_LinesOfCreditCurrent_F49EF46AFF5102D344C736868246913F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_665E8580B1BEB6B5B43036868246F66C" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_3C198780EF0CD8CF266536868245CE43" xlink:to="loc_us-gaap_AccountsPayableCurrent_665E8580B1BEB6B5B43036868246F66C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent_FF0CD1BFE03774F00AF33686824627A9" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_3C198780EF0CD8CF266536868245CE43" xlink:to="loc_us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent_FF0CD1BFE03774F00AF33686824627A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_0543A74948F3F6BA9C3D368682467524" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_3C198780EF0CD8CF266536868245CE43" xlink:to="loc_us-gaap_LiabilitiesCurrent_0543A74948F3F6BA9C3D368682467524" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetRetirementObligationsNoncurrent" xlink:label="loc_us-gaap_AssetRetirementObligationsNoncurrent_354D6557CF553525F6A23686824625BC" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_45BC62D23AC7922D9730368682452072" xlink:to="loc_us-gaap_AssetRetirementObligationsNoncurrent_354D6557CF553525F6A23686824625BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_D66BA8DA1058505EF6C336868246C23D" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_45BC62D23AC7922D9730368682452072" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_D66BA8DA1058505EF6C336868246C23D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_F104A7F671E53AD872C3368682467D3E" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_45BC62D23AC7922D9730368682452072" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_F104A7F671E53AD872C3368682467D3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_4ACAA27819FBEB31B9A2368682464352" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_45BC62D23AC7922D9730368682452072" xlink:to="loc_us-gaap_Liabilities_4ACAA27819FBEB31B9A2368682464352" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_4F529027E298E293FE1336868246400D" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_45BC62D23AC7922D9730368682452072" xlink:to="loc_us-gaap_CommitmentsAndContingencies_4F529027E298E293FE1336868246400D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_C721FCDD3F0122E498443686824625AA" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_45BC62D23AC7922D9730368682452072" xlink:to="loc_us-gaap_StockholdersEquityAbstract_C721FCDD3F0122E498443686824625AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_B06B3AD0571FAB737F72368682467B05" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_C721FCDD3F0122E498443686824625AA" xlink:to="loc_us-gaap_PreferredStockValue_B06B3AD0571FAB737F72368682467B05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_F57C20EE871EF6C0C18B368682463E05" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_C721FCDD3F0122E498443686824625AA" xlink:to="loc_us-gaap_CommonStockValue_F57C20EE871EF6C0C18B368682463E05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_7815FC133A67202BCB96368682468661" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_C721FCDD3F0122E498443686824625AA" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_7815FC133A67202BCB96368682468661" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_E48CBF90E1CF679A743936868246C36B" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_C721FCDD3F0122E498443686824625AA" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_E48CBF90E1CF679A743936868246C36B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_36363605E1673F054B8E36868246AAEC" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_C721FCDD3F0122E498443686824625AA" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_36363605E1673F054B8E36868246AAEC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_A765BB66742123D896E53686824694FB" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_C721FCDD3F0122E498443686824625AA" xlink:to="loc_us-gaap_StockholdersEquity_A765BB66742123D896E53686824694FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_1FB59D2C72A901E793D836868246EC0B" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_45BC62D23AC7922D9730368682452072" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_1FB59D2C72A901E793D836868246EC0B" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_DE020382C8C48BFAD6DDE8043D047A53" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_2FABA54A3FF255FE1DD3E8043D0530A9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_DE020382C8C48BFAD6DDE8043D047A53" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_2FABA54A3FF255FE1DD3E8043D0530A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_A19C944E36EC977AFB34E8043D050A64" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_DE020382C8C48BFAD6DDE8043D047A53" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_A19C944E36EC977AFB34E8043D050A64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_8F69B4DDA341BFD736ADE8043D058F62" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_DE020382C8C48BFAD6DDE8043D047A53" xlink:to="loc_us-gaap_PreferredStockSharesIssued_8F69B4DDA341BFD736ADE8043D058F62" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_F0DDDC193671F9CD0819E8043D053520" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_DE020382C8C48BFAD6DDE8043D047A53" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_F0DDDC193671F9CD0819E8043D053520" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_885689C933D3E8CC1BCCE8043D05ADA6" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_DE020382C8C48BFAD6DDE8043D047A53" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_885689C933D3E8CC1BCCE8043D05ADA6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_24E378E1E491BC8DE63BE8043D05F25D" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_DE020382C8C48BFAD6DDE8043D047A53" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_24E378E1E491BC8DE63BE8043D05F25D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_A120310932D6BED80C63E8043D0532AF" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_DE020382C8C48BFAD6DDE8043D047A53" xlink:to="loc_us-gaap_CommonStockSharesIssued_A120310932D6BED80C63E8043D0532AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_CE0F23B93863CFA9183EE8043D05C6BD" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_DE020382C8C48BFAD6DDE8043D047A53" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_CE0F23B93863CFA9183EE8043D05C6BD" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/CondensedConsolidatedStatementsOfCashFlowsUnaudited" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract" xlink:label="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_86AB2309929E5FF4F6C06F39608AEC8A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_6692839C24AC3A1BD27F6F39608AD14B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_86AB2309929E5FF4F6C06F39608AEC8A" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_6692839C24AC3A1BD27F6F39608AD14B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_2236E9001C71CEBA5ADA6F39608ADDDC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_6692839C24AC3A1BD27F6F39608AD14B" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_2236E9001C71CEBA5ADA6F39608ADDDC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B5E7F03B6D66558E3C756F39608A1149" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_6692839C24AC3A1BD27F6F39608AD14B" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B5E7F03B6D66558E3C756F39608A1149" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNet" xlink:label="loc_us-gaap_DepreciationAmortizationAndAccretionNet_06F12B428AD37AC639436F39608A2315" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B5E7F03B6D66558E3C756F39608A1149" xlink:to="loc_us-gaap_DepreciationAmortizationAndAccretionNet_06F12B428AD37AC639436F39608A2315" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_975BBBFA4E9A3A41119E6F39608A1201" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B5E7F03B6D66558E3C756F39608A1149" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_975BBBFA4E9A3A41119E6F39608A1201" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryWriteDown" xlink:label="loc_us-gaap_InventoryWriteDown_AF78999380D1B1F722E16F39608A7746" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B5E7F03B6D66558E3C756F39608A1149" xlink:to="loc_us-gaap_InventoryWriteDown_AF78999380D1B1F722E16F39608A7746" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_F9C1058AFE00186A22266F39608BFCDB" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B5E7F03B6D66558E3C756F39608A1149" xlink:to="loc_us-gaap_ShareBasedCompensation_F9C1058AFE00186A22266F39608BFCDB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges" xlink:label="loc_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_2AF0F5088063CB19FC996F39608B5B32" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B5E7F03B6D66558E3C756F39608A1149" xlink:to="loc_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_2AF0F5088063CB19FC996F39608B5B32" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_ED47FAAE4D1C070B3D596F39608B96DC" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B5E7F03B6D66558E3C756F39608A1149" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_ED47FAAE4D1C070B3D596F39608B96DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_AA3A8625ECE303FF8FC96F39608B57E5" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B5E7F03B6D66558E3C756F39608A1149" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_AA3A8625ECE303FF8FC96F39608B57E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_B3FF458E53D43FCC161B6F39608B5BD9" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_6692839C24AC3A1BD27F6F39608AD14B" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_B3FF458E53D43FCC161B6F39608B5BD9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_7541E36C5B1F367507706F39608B3CEB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_B3FF458E53D43FCC161B6F39608B5BD9" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_7541E36C5B1F367507706F39608B3CEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_75B79CD52B7E696215466F39608B3202" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_B3FF458E53D43FCC161B6F39608B5BD9" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_75B79CD52B7E696215466F39608B3202" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_9B6796585D0C786751666F39608B075C" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_B3FF458E53D43FCC161B6F39608B5BD9" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_9B6796585D0C786751666F39608B075C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_8EE434E7D35A8D21447A6F39608B4264" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_B3FF458E53D43FCC161B6F39608B5BD9" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_8EE434E7D35A8D21447A6F39608B4264" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_3C7BDC6C220E4E17E49E6F39608B914C" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_B3FF458E53D43FCC161B6F39608B5BD9" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_3C7BDC6C220E4E17E49E6F39608B914C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_F64AFA3B32BF8C40D4F36F39608B34FB" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract_6692839C24AC3A1BD27F6F39608AD14B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_F64AFA3B32BF8C40D4F36F39608B34FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_01AA8DF9B932E88838306F39608B8922" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_86AB2309929E5FF4F6C06F39608AEC8A" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_01AA8DF9B932E88838306F39608B8922" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfProductiveAssets" xlink:label="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_34A70EBE59D7198855816F39608B2303" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_01AA8DF9B932E88838306F39608B8922" xlink:to="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_34A70EBE59D7198855816F39608B2303" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssets" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_A70C5671CF064A532BAB6F39608B99AC" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_01AA8DF9B932E88838306F39608B8922" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_A70C5671CF064A532BAB6F39608B99AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_695018873F5963A18D1E6F39608BD375" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_01AA8DF9B932E88838306F39608B8922" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_695018873F5963A18D1E6F39608BD375" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_067B012272FEF0EEBAEA6F39608CEC6E" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_01AA8DF9B932E88838306F39608B8922" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_067B012272FEF0EEBAEA6F39608CEC6E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_83A7415C67EC9CB712086F39608C4AD7" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_86AB2309929E5FF4F6C06F39608AEC8A" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_83A7415C67EC9CB712086F39608C4AD7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_296A4BF4F9AE0F54672D6F39608C44C4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_83A7415C67EC9CB712086F39608C4AD7" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_296A4BF4F9AE0F54672D6F39608C44C4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_A09123469EBF80654CF26F39608CBD95" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_83A7415C67EC9CB712086F39608C4AD7" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_A09123469EBF80654CF26F39608CBD95" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_1B8573A840B6A9B6F7C56F39608C7874" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_83A7415C67EC9CB712086F39608C4AD7" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_1B8573A840B6A9B6F7C56F39608C7874" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsOfStockIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_2493154657F292AA00E66F39608CA545" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_83A7415C67EC9CB712086F39608C4AD7" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_2493154657F292AA00E66F39608CA545" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_53CBA5433D4722A78DCB6F39608C9352" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_83A7415C67EC9CB712086F39608C4AD7" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_53CBA5433D4722A78DCB6F39608C9352" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_4799717788E4A7CD9E466F39608C6A6A" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_83A7415C67EC9CB712086F39608C4AD7" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_4799717788E4A7CD9E466F39608C6A6A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_470E71E62FAD26FF8AB06F39608CE7CB" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_83A7415C67EC9CB712086F39608C4AD7" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_470E71E62FAD26FF8AB06F39608CE7CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_932CEC0118756A1BFBDB6F39608C445A" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_83A7415C67EC9CB712086F39608C4AD7" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_932CEC0118756A1BFBDB6F39608C445A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_48454873CE8D884B10046F39608C13EA" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract_83A7415C67EC9CB712086F39608C4AD7" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_48454873CE8D884B10046F39608C13EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations_9A894FD2007562306E136F39608C4085" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_86AB2309929E5FF4F6C06F39608AEC8A" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations_9A894FD2007562306E136F39608C4085" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_8D45CF26C099CCCDA8076F39608CC022" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_86AB2309929E5FF4F6C06F39608AEC8A" xlink:to="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_8D45CF26C099CCCDA8076F39608CC022" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_A8C67A20257F9C344A026F39608CEA42" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_86AB2309929E5FF4F6C06F39608AEC8A" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_A8C67A20257F9C344A026F39608CEA42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_77F17E241F10B1044AD96F39608C2234" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_86AB2309929E5FF4F6C06F39608AEC8A" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_77F17E241F10B1044AD96F39608C2234" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeUnaudited" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_CA90370682581C8180673A330AB37F83" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_10E37DF4AF527D25F1F13A330AB322C9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_CA90370682581C8180673A330AB37F83" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_10E37DF4AF527D25F1F13A330AB322C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_73931D2D3232ECE4986D3A330AB35A35" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_CA90370682581C8180673A330AB37F83" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_73931D2D3232ECE4986D3A330AB35A35" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_677D1F6E147C0D30C0463A330AB3D582" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_73931D2D3232ECE4986D3A330AB35A35" xlink:to="loc_us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_677D1F6E147C0D30C0463A330AB3D582" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_40E3C8897CB24AD39D6C3A330AB34629" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_73931D2D3232ECE4986D3A330AB35A35" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_40E3C8897CB24AD39D6C3A330AB34629" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_8050650FCBC493EF2DD63A330AB396F0" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_73931D2D3232ECE4986D3A330AB35A35" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_8050650FCBC493EF2DD63A330AB396F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_8AEBA8B01178E712AD713A330AB3BD3C" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_CA90370682581C8180673A330AB37F83" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_8AEBA8B01178E712AD713A330AB3BD3C" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/CondensedConsolidatedStatementsOfOperationsUnaudited" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_24B18421A98EF544EA1272EABFAD0E3D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_Revenues_24B18421A98EF544EA1272EABFAD0E3D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostOfGoodsSold" xlink:label="loc_us-gaap_CostOfGoodsSold_11C843813F6F289D5A6972EABFAD4E53" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_CostOfGoodsSold_11C843813F6F289D5A6972EABFAD4E53" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_CC1F6ECA60A394C8A3E672EABFADF2BF" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_GrossProfit_CC1F6ECA60A394C8A3E672EABFADF2BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="loc_us-gaap_OperatingExpensesAbstract_CA2D23CEC6DE4DED67A672EABFADFBB9" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_OperatingExpensesAbstract_CA2D23CEC6DE4DED67A672EABFADFBB9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="loc_us-gaap_SellingAndMarketingExpense_628504AB8DA95C13B60272EABFAD6611" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_CA2D23CEC6DE4DED67A672EABFADFBB9" xlink:to="loc_us-gaap_SellingAndMarketingExpense_628504AB8DA95C13B60272EABFAD6611" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_28691F6DCBF2AF92E61C72EABFADBBE5" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_CA2D23CEC6DE4DED67A672EABFADFBB9" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_28691F6DCBF2AF92E61C72EABFADBBE5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_3806CF43AC454F862AED72EABFAD0303" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_CA2D23CEC6DE4DED67A672EABFADFBB9" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_3806CF43AC454F862AED72EABFAD0303" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_OperatingExpensesBeforeGainLossOnSaleOfAssets" xlink:label="loc_lnth_OperatingExpensesBeforeGainLossOnSaleOfAssets_0882D60A5D7F5B1EE08372EABFAD604D" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_CA2D23CEC6DE4DED67A672EABFADFBB9" xlink:to="loc_lnth_OperatingExpensesBeforeGainLossOnSaleOfAssets_0882D60A5D7F5B1EE08372EABFAD604D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges" xlink:label="loc_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_DDA040838C09A4E5D72472EABFAD8BF9" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_DDA040838C09A4E5D72472EABFAD8BF9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_E8B545C3B0CDB22F7D8E72EABFAD2642" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_OperatingIncomeLoss_E8B545C3B0CDB22F7D8E72EABFAD2642" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_D85781F80547A51E757E72EABFAD6922" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_InterestExpense_D85781F80547A51E757E72EABFAD6922" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_843B970285259353E1C672EABFAE9F4B" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_843B970285259353E1C672EABFAE9F4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebtBeforeWriteOffOfDeferredDebtIssuanceCost" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebtBeforeWriteOffOfDeferredDebtIssuanceCost_602654FE53C1B71F843F72F516DD3BFE" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebtBeforeWriteOffOfDeferredDebtIssuanceCost_602654FE53C1B71F843F72F516DD3BFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_DA1090872B2A872A57C572EABFAEE44F" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_DA1090872B2A872A57C572EABFAEE44F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_B21A559ABD8B90BF2FF572EABFAE549E" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_B21A559ABD8B90BF2FF572EABFAE549E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_B506E22809A81FDC3A7272EABFAE1190" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_B506E22809A81FDC3A7272EABFAE1190" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_7925C8BBC2A936C3191872EABFAEBFC7" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_7925C8BBC2A936C3191872EABFAEBFC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:label="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_6AF1466531F5CE4B8BF872EABFAE9A2B" xlink:type="locator" />
    <link:presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_6AF1466531F5CE4B8BF872EABFAE9A2B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_0F16F03748338AD123D672EABFAE312F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_6AF1466531F5CE4B8BF872EABFAE9A2B" xlink:to="loc_us-gaap_EarningsPerShareBasic_0F16F03748338AD123D672EABFAE312F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_F12A0FEF094B77B11E5D72EABFAE6254" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_6AF1466531F5CE4B8BF872EABFAE9A2B" xlink:to="loc_us-gaap_EarningsPerShareDiluted_F12A0FEF094B77B11E5D72EABFAE6254" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract" xlink:label="loc_us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_AAEA8CF7EEFE2AE7344672EABFAE67B5" xlink:type="locator" />
    <link:presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_E55B2913476D76AE117772EABFAD576F" xlink:to="loc_us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_AAEA8CF7EEFE2AE7344672EABFAE67B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_416930874A1CF552538072EABFAEA73E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_AAEA8CF7EEFE2AE7344672EABFAE67B5" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_416930874A1CF552538072EABFAEA73E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_852579DD3617F2C4E4E172EABFAE533D" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedOtherDisclosuresAbstract_AAEA8CF7EEFE2AE7344672EABFAE67B5" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_852579DD3617F2C4E4E172EABFAE533D" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/DocumentAndEntityInformation" xlink:type="extended">
    <link:loc xlink:href="lnth-20170930.xsd#lnth_DocumentAndEntityInformationAbstract" xlink:label="loc_lnth_DocumentAndEntityInformationAbstract_63D046B5DA488A1412C8E8043D11AC9A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_20CBD9986DA4AD6C5401E8043D114ABF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DocumentAndEntityInformationAbstract_63D046B5DA488A1412C8E8043D11AC9A" xlink:to="loc_dei_DocumentType_20CBD9986DA4AD6C5401E8043D114ABF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_6E2AEE991F0524932A76E8043D11A29C" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DocumentAndEntityInformationAbstract_63D046B5DA488A1412C8E8043D11AC9A" xlink:to="loc_dei_AmendmentFlag_6E2AEE991F0524932A76E8043D11A29C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_0091D49B889ED60F3DDBE8043D11F29E" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DocumentAndEntityInformationAbstract_63D046B5DA488A1412C8E8043D11AC9A" xlink:to="loc_dei_DocumentPeriodEndDate_0091D49B889ED60F3DDBE8043D11F29E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_04D68C439B83854E8F65E8043D113DBD" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DocumentAndEntityInformationAbstract_63D046B5DA488A1412C8E8043D11AC9A" xlink:to="loc_dei_DocumentFiscalYearFocus_04D68C439B83854E8F65E8043D113DBD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_BAD1090567BA91498C81E8043D12D204" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DocumentAndEntityInformationAbstract_63D046B5DA488A1412C8E8043D11AC9A" xlink:to="loc_dei_DocumentFiscalPeriodFocus_BAD1090567BA91498C81E8043D12D204" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol_62640262A699B55DE8A0E8043D12E18A" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DocumentAndEntityInformationAbstract_63D046B5DA488A1412C8E8043D11AC9A" xlink:to="loc_dei_TradingSymbol_62640262A699B55DE8A0E8043D12E18A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_93DD0005FE500C1BE582E8043D125814" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DocumentAndEntityInformationAbstract_63D046B5DA488A1412C8E8043D11AC9A" xlink:to="loc_dei_EntityRegistrantName_93DD0005FE500C1BE582E8043D125814" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_272E24B9EC640ADAB183E8043D127639" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DocumentAndEntityInformationAbstract_63D046B5DA488A1412C8E8043D11AC9A" xlink:to="loc_dei_EntityCentralIndexKey_272E24B9EC640ADAB183E8043D127639" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_43E3A2FCD16F47300FB9E8043D125A00" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DocumentAndEntityInformationAbstract_63D046B5DA488A1412C8E8043D11AC9A" xlink:to="loc_dei_CurrentFiscalYearEndDate_43E3A2FCD16F47300FB9E8043D125A00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_4900A9D290296B3A7EA9E8043D12DD0A" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DocumentAndEntityInformationAbstract_63D046B5DA488A1412C8E8043D11AC9A" xlink:to="loc_dei_EntityFilerCategory_4900A9D290296B3A7EA9E8043D12DD0A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_AA3E983D22F9E59D9FDFE8043D12310D" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DocumentAndEntityInformationAbstract_63D046B5DA488A1412C8E8043D11AC9A" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_AA3E983D22F9E59D9FDFE8043D12310D" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/FairValueOfFinancialInstruments" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_1C98C9F476BC53BFB717093E1FC0A72C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock_073809FF6777588C9F30F623FC4F6BA6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_1C98C9F476BC53BFB717093E1FC0A72C" xlink:to="loc_us-gaap_FairValueDisclosuresTextBlock_073809FF6777588C9F30F623FC4F6BA6" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/FairValueOfFinancialInstrumentsScheduleOfInformationAboutCompanysAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_CE69588BA31FC47ABFBC35F5D74E09AC" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_180FD85D76433D15C17435F5D74EF70D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_CE69588BA31FC47ABFBC35F5D74E09AC" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_180FD85D76433D15C17435F5D74EF70D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_53C1D67582BA3A8EF2C235F5D74E59B9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_180FD85D76433D15C17435F5D74EF70D" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_53C1D67582BA3A8EF2C235F5D74E59B9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_667D89226751009F69B135F5D74EFD64" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_53C1D67582BA3A8EF2C235F5D74E59B9" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_667D89226751009F69B135F5D74EFD64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_F80144C36A46A2D4BF6E35F5D74EB88A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_667D89226751009F69B135F5D74EFD64" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_F80144C36A46A2D4BF6E35F5D74EB88A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_3A9592BCDCFA26CC2F5035F5D74E9AF1" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_667D89226751009F69B135F5D74EFD64" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_3A9592BCDCFA26CC2F5035F5D74E9AF1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_36EBE9B214270EC105E735F5D74E2081" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_667D89226751009F69B135F5D74EFD64" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_36EBE9B214270EC105E735F5D74E2081" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsAxis" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_475AD2BFAE8C5BECD14335F5D74FD8FA" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_180FD85D76433D15C17435F5D74EF70D" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_475AD2BFAE8C5BECD14335F5D74FD8FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_B7712374A3327C9D4F0135F5D74FBE66" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_475AD2BFAE8C5BECD14335F5D74FD8FA" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_B7712374A3327C9D4F0135F5D74FBE66" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MoneyMarketFundsMember" xlink:label="loc_us-gaap_MoneyMarketFundsMember_3F1C6FCCD0A66C133D5235F5D74FB900" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_B7712374A3327C9D4F0135F5D74FBE66" xlink:to="loc_us-gaap_MoneyMarketFundsMember_3F1C6FCCD0A66C133D5235F5D74FB900" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_F6B73068268B831C040B35F5D74F56CD" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_180FD85D76433D15C17435F5D74EF70D" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_F6B73068268B831C040B35F5D74F56CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_BD9B77EAB16059EB6CDD35F5D74FE583" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_F6B73068268B831C040B35F5D74F56CD" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_BD9B77EAB16059EB6CDD35F5D74FE583" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_20DE6D1A94D295C86A8135F5D74F018D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_BD9B77EAB16059EB6CDD35F5D74FE583" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_20DE6D1A94D295C86A8135F5D74F018D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_972B7D5AE476FFF146F735F5D74FE13B" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_180FD85D76433D15C17435F5D74EF70D" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_972B7D5AE476FFF146F735F5D74FE13B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_0F457A38C122B717DB6E35F5D74F8DF8" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_972B7D5AE476FFF146F735F5D74FE13B" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_0F457A38C122B717DB6E35F5D74F8DF8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_2B771487B18B8E249E3B35F5D74FEDC4" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_972B7D5AE476FFF146F735F5D74FE13B" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_2B771487B18B8E249E3B35F5D74FEDC4" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/FairValueOfFinancialInstrumentsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_048019E8A51B6237FF71E872DD1D560F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_C5B3FD53011ED1A6B978E872DD1D3EA6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_048019E8A51B6237FF71E872DD1D560F" xlink:to="loc_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_C5B3FD53011ED1A6B978E872DD1D3EA6" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/FinancingArrangements" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_C12B3976B5475A14A517417F138715FA" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="loc_us-gaap_DebtDisclosureTextBlock_C77F7FFDF73E590E8DA9877E8A058A2D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_C12B3976B5475A14A517417F138715FA" xlink:to="loc_us-gaap_DebtDisclosureTextBlock_C77F7FFDF73E590E8DA9877E8A058A2D" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/FinancingArrangementsAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_1B1F1CFE359B74EB3BF36F3960174EDA" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_3191DEA804038C0FF9476F3960174745" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_1B1F1CFE359B74EB3BF36F3960174EDA" xlink:to="loc_us-gaap_DebtInstrumentTable_3191DEA804038C0FF9476F3960174745" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_582A75CF52FABC6E3E266F3960174372" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_3191DEA804038C0FF9476F3960174745" xlink:to="loc_us-gaap_CreditFacilityAxis_582A75CF52FABC6E3E266F3960174372" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_BA9EFE006FBC0E2C872F6F396017F81D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityAxis_582A75CF52FABC6E3E266F3960174372" xlink:to="loc_us-gaap_CreditFacilityDomain_BA9EFE006FBC0E2C872F6F396017F81D" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_TwoThousandAndFifteenTermFacilityMember" xlink:label="loc_lnth_TwoThousandAndFifteenTermFacilityMember_52CAD0DFBA8D927894636F3960177580" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_BA9EFE006FBC0E2C872F6F396017F81D" xlink:to="loc_lnth_TwoThousandAndFifteenTermFacilityMember_52CAD0DFBA8D927894636F3960177580" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_TwoThousandAndSeventeenTermFacilityMember" xlink:label="loc_lnth_TwoThousandAndSeventeenTermFacilityMember_12FCED76EBC5A0AF32246F3960179EEA" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_BA9EFE006FBC0E2C872F6F396017F81D" xlink:to="loc_lnth_TwoThousandAndSeventeenTermFacilityMember_12FCED76EBC5A0AF32246F3960179EEA" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_AssetBasedLoanFacilityMember" xlink:label="loc_lnth_AssetBasedLoanFacilityMember_391DA6B067E84DE545816F396017CCFF" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_BA9EFE006FBC0E2C872F6F396017F81D" xlink:to="loc_lnth_AssetBasedLoanFacilityMember_391DA6B067E84DE545816F396017CCFF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_F8ECD2967AF1857E0B2C6F396017FC1D" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_BA9EFE006FBC0E2C872F6F396017F81D" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_F8ECD2967AF1857E0B2C6F396017FC1D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_CA4A91127D361A0811876F3960172BD6" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_3191DEA804038C0FF9476F3960174745" xlink:to="loc_us-gaap_VariableRateAxis_CA4A91127D361A0811876F3960172BD6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_49AFC2435DA3715E4B786F3960180E1B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_VariableRateAxis_CA4A91127D361A0811876F3960172BD6" xlink:to="loc_us-gaap_VariableRateDomain_49AFC2435DA3715E4B786F3960180E1B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_FF0AE2EDD2DF7858078F6F3960185AD1" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_VariableRateDomain_49AFC2435DA3715E4B786F3960180E1B" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_FF0AE2EDD2DF7858078F6F3960185AD1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BaseRateMember" xlink:label="loc_us-gaap_BaseRateMember_6EF49A204E8AB9E27D9A6F39601807E5" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_VariableRateDomain_49AFC2435DA3715E4B786F3960180E1B" xlink:to="loc_us-gaap_BaseRateMember_6EF49A204E8AB9E27D9A6F39601807E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_A1A2F94F6CCFB6EF7FE46F3960181039" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_3191DEA804038C0FF9476F3960174745" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_A1A2F94F6CCFB6EF7FE46F3960181039" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_6368B683D2C0BD59122B6F3960180FFC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_A1A2F94F6CCFB6EF7FE46F3960181039" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_6368B683D2C0BD59122B6F3960180FFC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:label="loc_us-gaap_LetterOfCreditMember_107710C9321C05A0ACA56F396018ACF9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_6368B683D2C0BD59122B6F3960180FFC" xlink:to="loc_us-gaap_LetterOfCreditMember_107710C9321C05A0ACA56F396018ACF9" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_LeverageRatioRangeAxis" xlink:label="loc_lnth_LeverageRatioRangeAxis_DA81169A777B92E826856F396017BFA4" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_3191DEA804038C0FF9476F3960174745" xlink:to="loc_lnth_LeverageRatioRangeAxis_DA81169A777B92E826856F396017BFA4" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_LeverageRatioRangeDomain" xlink:label="loc_lnth_LeverageRatioRangeDomain_16B843D77AF1CECD36086F598244EE74" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_LeverageRatioRangeAxis_DA81169A777B92E826856F396017BFA4" xlink:to="loc_lnth_LeverageRatioRangeDomain_16B843D77AF1CECD36086F598244EE74" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_LeverageRatioRangeOneMember" xlink:label="loc_lnth_LeverageRatioRangeOneMember_780341E883E9A4CF8C616F522DC2F152" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_LeverageRatioRangeDomain_16B843D77AF1CECD36086F598244EE74" xlink:to="loc_lnth_LeverageRatioRangeOneMember_780341E883E9A4CF8C616F522DC2F152" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_LeverageRatioRangeTwoMember" xlink:label="loc_lnth_LeverageRatioRangeTwoMember_BF3CE86F1E03C66A147A6F4F79299448" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_LeverageRatioRangeDomain_16B843D77AF1CECD36086F598244EE74" xlink:to="loc_lnth_LeverageRatioRangeTwoMember_BF3CE86F1E03C66A147A6F4F79299448" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_3191DEA804038C0FF9476F3960174745" xlink:to="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_2AF4FB93C3B465C767226F396018D895" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_2AF4FB93C3B465C767226F396018D895" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTerm" xlink:label="loc_us-gaap_DebtInstrumentTerm_DD60FC5FE441DA3CD54C6F3960188ABE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_us-gaap_DebtInstrumentTerm_DD60FC5FE441DA3CD54C6F3960188ABE" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_DebtInstrumentDiscountAmount" xlink:label="loc_lnth_DebtInstrumentDiscountAmount_9BB1572E83D74D15F2FC6F3960181D78" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_lnth_DebtInstrumentDiscountAmount_9BB1572E83D74D15F2FC6F3960181D78" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_DebtInstrumentAdditionalBorrowingCapacity" xlink:label="loc_lnth_DebtInstrumentAdditionalBorrowingCapacity_35C484B2D084BF989DAE6F396018DFB5" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_lnth_DebtInstrumentAdditionalBorrowingCapacity_35C484B2D084BF989DAE6F396018DFB5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RepaymentsOfDebt" xlink:label="loc_us-gaap_RepaymentsOfDebt_36E8983AA61FC5718A0A6F396018A7CB" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_us-gaap_RepaymentsOfDebt_36E8983AA61FC5718A0A6F396018A7CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_046C5E9FAE48F2C499436F3960181B10" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_046C5E9FAE48F2C499436F3960181B10" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_14F27B79FC558434B8E36F3960189A52" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_14F27B79FC558434B8E36F3960189A52" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_CostAssociatedWithDebtModification" xlink:label="loc_lnth_CostAssociatedWithDebtModification_9B873466E7A8BB598AA66F396018BB18" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_lnth_CostAssociatedWithDebtModification_9B873466E7A8BB598AA66F396018BB18" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_CapitalizedDebtIssuanceCost" xlink:label="loc_lnth_CapitalizedDebtIssuanceCost_0295103B94E2B75077D06F39601857FC" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_lnth_CapitalizedDebtIssuanceCost_0295103B94E2B75077D06F39601857FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_8ECF5F8E301087582FFB6F396018D546" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_8ECF5F8E301087582FFB6F396018D546" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_E832D9286CD3270C4E4D6F3960198180" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_E832D9286CD3270C4E4D6F3960198180" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_DebtInstrumentAmortizationPercentage" xlink:label="loc_lnth_DebtInstrumentAmortizationPercentage_2508336C6D6C068308896F396019B06A" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_lnth_DebtInstrumentAmortizationPercentage_2508336C6D6C068308896F396019B06A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_E75FC0C43211C593BB066F396019DDAA" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_E75FC0C43211C593BB066F396019DDAA" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_DebtInstrumentCovenantLeverageRatio" xlink:label="loc_lnth_DebtInstrumentCovenantLeverageRatio_DBECE255C6A27B0706076F396019337F" xlink:type="locator" />
    <link:presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_lnth_DebtInstrumentCovenantLeverageRatio_DBECE255C6A27B0706076F396019337F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_5BFB1715FF5A717B4CDB6F396019671A" xlink:type="locator" />
    <link:presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ADC4E259B50046EE51B6F3960187F70" xlink:to="loc_us-gaap_LineOfCredit_5BFB1715FF5A717B4CDB6F396019671A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/FinancingArrangementsScheduleOfMaturitiesOfPrincipalObligationsUnderNewTermFacilityDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_28C6C56F819100C5BB0B12432BF2B010" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_3E5817FDEC144E7B075612432BF2BE79" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_28C6C56F819100C5BB0B12432BF2B010" xlink:to="loc_us-gaap_DebtInstrumentTable_3E5817FDEC144E7B075612432BF2BE79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_7471588482E7CEB1D6B812432BF2C126" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_3E5817FDEC144E7B075612432BF2BE79" xlink:to="loc_us-gaap_CreditFacilityAxis_7471588482E7CEB1D6B812432BF2C126" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_D3EA29B93631C8D4204012432BF28FF1" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityAxis_7471588482E7CEB1D6B812432BF2C126" xlink:to="loc_us-gaap_CreditFacilityDomain_D3EA29B93631C8D4204012432BF28FF1" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_TwoThousandAndSeventeenTermFacilityMember" xlink:label="loc_lnth_TwoThousandAndSeventeenTermFacilityMember_9581A96E1665C018CFCE12432BF39CC6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_D3EA29B93631C8D4204012432BF28FF1" xlink:to="loc_lnth_TwoThousandAndSeventeenTermFacilityMember_9581A96E1665C018CFCE12432BF39CC6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_2C35CF3F33B64A4071F412432BF3700E" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_3E5817FDEC144E7B075612432BF2BE79" xlink:to="loc_us-gaap_DebtInstrumentLineItems_2C35CF3F33B64A4071F412432BF3700E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_15B3FCA138AB7E97C6C012432BF31C87" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2C35CF3F33B64A4071F412432BF3700E" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_15B3FCA138AB7E97C6C012432BF31C87" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_566C60AA2F5E7435EB3512432BF3A773" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2C35CF3F33B64A4071F412432BF3700E" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_566C60AA2F5E7435EB3512432BF3A773" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_BDDD65F595AB9F44D8A612432BF36C22" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2C35CF3F33B64A4071F412432BF3700E" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_BDDD65F595AB9F44D8A612432BF36C22" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_07C56CEC65CBC9714F1912432BF3FE01" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2C35CF3F33B64A4071F412432BF3700E" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_07C56CEC65CBC9714F1912432BF3FE01" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_FF6B3789CC36E46B980912432BF37617" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2C35CF3F33B64A4071F412432BF3700E" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_FF6B3789CC36E46B980912432BF37617" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_F7003FE820B2BD08333712432BF3C4E4" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2C35CF3F33B64A4071F412432BF3700E" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_F7003FE820B2BD08333712432BF3C4E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_CAA3CB1C9997F8449ADE12432BF38F17" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2C35CF3F33B64A4071F412432BF3700E" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_CAA3CB1C9997F8449ADE12432BF38F17" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_13CCCF301535875B46AA12432BF31ACB" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2C35CF3F33B64A4071F412432BF3700E" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_13CCCF301535875B46AA12432BF31ACB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_5CCB0E8857EF206818D112432BF38F26" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2C35CF3F33B64A4071F412432BF3700E" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_5CCB0E8857EF206818D112432BF38F26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_F4140A5BA61FDA05B51E12432BF39E48" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2C35CF3F33B64A4071F412432BF3700E" xlink:to="loc_us-gaap_LongTermDebt_F4140A5BA61FDA05B51E12432BF39E48" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_32504BA6E508733D263712432BF3E700" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2C35CF3F33B64A4071F412432BF3700E" xlink:to="loc_us-gaap_LongTermDebtCurrent_32504BA6E508733D263712432BF3E700" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_C524A372F6B9F9AB599612432BF34AEA" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2C35CF3F33B64A4071F412432BF3700E" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_C524A372F6B9F9AB599612432BF34AEA" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/FinancingArrangementsScheduleOfTermFacilityFinancialCovenantDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_40B4EA8E9A9754D1A092593F9084D5E6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_3F8B4896CD7573764B1C593F9084F433" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_40B4EA8E9A9754D1A092593F9084D5E6" xlink:to="loc_us-gaap_DebtInstrumentTable_3F8B4896CD7573764B1C593F9084F433" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_E528705D66FDDEE156A4593F908554D2" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_3F8B4896CD7573764B1C593F9084F433" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_E528705D66FDDEE156A4593F908554D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_BBC351A1857786361E23593F90856546" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_E528705D66FDDEE156A4593F908554D2" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_BBC351A1857786361E23593F90856546" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_TwoThousandAndSeventeenFacilityMember" xlink:label="loc_lnth_TwoThousandAndSeventeenFacilityMember_A9FD072336B199108ABA593F9085D19B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_BBC351A1857786361E23593F90856546" xlink:to="loc_lnth_TwoThousandAndSeventeenFacilityMember_A9FD072336B199108ABA593F9085D19B" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_DebtCovenantPeriodAxis" xlink:label="loc_lnth_DebtCovenantPeriodAxis_A9F750365AD7F3A6CD375945A4CC4FF4" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_3F8B4896CD7573764B1C593F9084F433" xlink:to="loc_lnth_DebtCovenantPeriodAxis_A9F750365AD7F3A6CD375945A4CC4FF4" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_DebtCovenantPeriodDomain" xlink:label="loc_lnth_DebtCovenantPeriodDomain_3E7CE829204C47C57956595DF8025F22" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DebtCovenantPeriodAxis_A9F750365AD7F3A6CD375945A4CC4FF4" xlink:to="loc_lnth_DebtCovenantPeriodDomain_3E7CE829204C47C57956595DF8025F22" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_Q32017ThroughQ12018Member" xlink:label="loc_lnth_Q32017ThroughQ12018Member_7514551972FA9B6145B2593F90856F5E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DebtCovenantPeriodDomain_3E7CE829204C47C57956595DF8025F22" xlink:to="loc_lnth_Q32017ThroughQ12018Member_7514551972FA9B6145B2593F90856F5E" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_Q22018throughQ12019Member" xlink:label="loc_lnth_Q22018throughQ12019Member_E677657DCAC4E83DCE15593F908527A6" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DebtCovenantPeriodDomain_3E7CE829204C47C57956595DF8025F22" xlink:to="loc_lnth_Q22018throughQ12019Member_E677657DCAC4E83DCE15593F908527A6" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_Q22019andThereafterMember" xlink:label="loc_lnth_Q22019andThereafterMember_884B5BD9D6251637BCAB593F90857F15" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_DebtCovenantPeriodDomain_3E7CE829204C47C57956595DF8025F22" xlink:to="loc_lnth_Q22019andThereafterMember_884B5BD9D6251637BCAB593F90857F15" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_96E55B981C530ACE7CCA593F908540E2" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_3F8B4896CD7573764B1C593F9084F433" xlink:to="loc_us-gaap_DebtInstrumentLineItems_96E55B981C530ACE7CCA593F908540E2" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_DebtInstrumentCovenantLeverageRatio" xlink:label="loc_lnth_DebtInstrumentCovenantLeverageRatio_73155C8363CAD25E70A8593F90855D21" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_96E55B981C530ACE7CCA593F908540E2" xlink:to="loc_lnth_DebtInstrumentCovenantLeverageRatio_73155C8363CAD25E70A8593F90855D21" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/FinancingArrangementsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_31EB08A81C6F5021BFEF31633E652FDC" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_329EBBBFA81D544F9126E256EDD1C42A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_31EB08A81C6F5021BFEF31633E652FDC" xlink:to="loc_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_329EBBBFA81D544F9126E256EDD1C42A" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_ScheduleOfTermFacilityFinancialCovenantsTableTextBlock" xlink:label="loc_lnth_ScheduleOfTermFacilityFinancialCovenantsTableTextBlock_00270F1B5DFE5ADEA7A739C4DF6FBA57" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_31EB08A81C6F5021BFEF31633E652FDC" xlink:to="loc_lnth_ScheduleOfTermFacilityFinancialCovenantsTableTextBlock_00270F1B5DFE5ADEA7A739C4DF6FBA57" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/IncomeTaxes" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_226E8B4932F058E5A6D0F027491189F9" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_AE3DA758EF775E54933AE6E0987AABF0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_226E8B4932F058E5A6D0F027491189F9" xlink:to="loc_us-gaap_IncomeTaxDisclosureTextBlock_AE3DA758EF775E54933AE6E0987AABF0" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/IncomeTaxesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_10837038854DB248F3934AFBE6A4B126" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_19AD46527EB8320931394AFBE6A47D04" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_10837038854DB248F3934AFBE6A4B126" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_19AD46527EB8320931394AFBE6A47D04" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/Inventory" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_46990A1823315A0DB551CE5AB6F55258" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryDisclosureTextBlock" xlink:label="loc_us-gaap_InventoryDisclosureTextBlock_BD7D4BF7BC75588DBD4E2DDFD0AA8B6F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_46990A1823315A0DB551CE5AB6F55258" xlink:to="loc_us-gaap_InventoryDisclosureTextBlock_BD7D4BF7BC75588DBD4E2DDFD0AA8B6F" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/InventoryAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_3BBDFB7675750CC7E9ABE872DCF52F31" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryCurrentTable" xlink:label="loc_us-gaap_InventoryCurrentTable_8A377EEABD447347AB28E872DCF5D3F1" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_3BBDFB7675750CC7E9ABE872DCF52F31" xlink:to="loc_us-gaap_InventoryCurrentTable_8A377EEABD447347AB28E872DCF5D3F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_AEE6F6061A3F0AC85494E872DCF59356" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryCurrentTable_8A377EEABD447347AB28E872DCF5D3F1" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_AEE6F6061A3F0AC85494E872DCF59356" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_48E758613875B605ED98E872DCF53511" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_AEE6F6061A3F0AC85494E872DCF59356" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_48E758613875B605ED98E872DCF53511" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNoncurrentAssetsMember" xlink:label="loc_us-gaap_OtherNoncurrentAssetsMember_324815A311354E45B1A7E872DCF5BF60" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_48E758613875B605ED98E872DCF53511" xlink:to="loc_us-gaap_OtherNoncurrentAssetsMember_324815A311354E45B1A7E872DCF5BF60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryLineItems" xlink:label="loc_us-gaap_InventoryLineItems_2DE86381EA0AF17DF6E3E872DCF5D320" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryCurrentTable_8A377EEABD447347AB28E872DCF5D3F1" xlink:to="loc_us-gaap_InventoryLineItems_2DE86381EA0AF17DF6E3E872DCF5D320" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryNoncurrent" xlink:label="loc_us-gaap_InventoryNoncurrent_BA1EE471939FFC275479E872DCF55A01" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryLineItems_2DE86381EA0AF17DF6E3E872DCF5D320" xlink:to="loc_us-gaap_InventoryNoncurrent_BA1EE471939FFC275479E872DCF55A01" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/InventoryScheduleOfInventoryDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_728A8B6656E9C5061537E872DCFCECD2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryRawMaterialsNetOfReserves" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_075402B43CCD48543757E872DCFCB6E8" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_728A8B6656E9C5061537E872DCFCECD2" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_075402B43CCD48543757E872DCFCB6E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryWorkInProcessNetOfReserves" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_15486354C0E23EDC3B1EE872DCFCDB3E" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_728A8B6656E9C5061537E872DCFCECD2" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_15486354C0E23EDC3B1EE872DCFCDB3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_21436DD60564193CB04FE872DCFC91EB" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_728A8B6656E9C5061537E872DCFCECD2" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_21436DD60564193CB04FE872DCFC91EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_CC7900D16E8165248875E872DCFD0D12" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_728A8B6656E9C5061537E872DCFCECD2" xlink:to="loc_us-gaap_InventoryNet_CC7900D16E8165248875E872DCFD0D12" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/InventoryTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_ADB2544F63D95507B757B41B5324B3F1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_6F6D8046F1C5516E9C60DA30D0F390D6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_ADB2544F63D95507B757B41B5324B3F1" xlink:to="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_6F6D8046F1C5516E9C60DA30D0F390D6" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/LegalProceedingsAndContingencies" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_B7AC6A1E5D3A5DDC9F472FEA368285A8" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LegalMattersAndContingenciesTextBlock" xlink:label="loc_us-gaap_LegalMattersAndContingenciesTextBlock_2F530D2F828E5715B7E61E9F6DD56397" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_B7AC6A1E5D3A5DDC9F472FEA368285A8" xlink:to="loc_us-gaap_LegalMattersAndContingenciesTextBlock_2F530D2F828E5715B7E61E9F6DD56397" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/NetIncomePerCommonShare" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_34F423F2FF2E5C85895F356C7C31841B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="loc_us-gaap_EarningsPerShareTextBlock_9828112CD04E5284A2C81261CA5EC83C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_34F423F2FF2E5C85895F356C7C31841B" xlink:to="loc_us-gaap_EarningsPerShareTextBlock_9828112CD04E5284A2C81261CA5EC83C" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/NetIncomePerCommonShareSummaryOfNetIncomePerCommonShareDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_2462E245DD1FA3822F8235F5D690E5F9" xlink:type="locator" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_EarningsPerShareTable" xlink:label="loc_lnth_EarningsPerShareTable_71AB0858BA90B15782C135F5D690E18F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_2462E245DD1FA3822F8235F5D690E5F9" xlink:to="loc_lnth_EarningsPerShareTable_71AB0858BA90B15782C135F5D690E18F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_B0841D3C4E2B9A70A19835F5D690F2DF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_EarningsPerShareTable_71AB0858BA90B15782C135F5D690E18F" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_B0841D3C4E2B9A70A19835F5D690F2DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_8600E1BD0E724C49614635F5D69010AA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_B0841D3C4E2B9A70A19835F5D690F2DF" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_8600E1BD0E724C49614635F5D69010AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_DB260084D46DEE6DA54235F5D69020D4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_8600E1BD0E724C49614635F5D69010AA" xlink:to="loc_us-gaap_EmployeeStockOptionMember_DB260084D46DEE6DA54235F5D69020D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_1FC3CAB0EEF3E054F94935F5D69020BF" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_EarningsPerShareTable_71AB0858BA90B15782C135F5D690E18F" xlink:to="loc_us-gaap_AwardTypeAxis_1FC3CAB0EEF3E054F94935F5D69020BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_C3E3F7F530045D4E6A8935F5D69017FA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_1FC3CAB0EEF3E054F94935F5D69020BF" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_C3E3F7F530045D4E6A8935F5D69017FA" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_UnvestedRestrictedStockMember" xlink:label="loc_lnth_UnvestedRestrictedStockMember_EC2670E5442D1F8292CE35F5D6900D49" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_C3E3F7F530045D4E6A8935F5D69017FA" xlink:to="loc_lnth_UnvestedRestrictedStockMember_EC2670E5442D1F8292CE35F5D6900D49" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_EarningsPerShareLineItems" xlink:label="loc_lnth_EarningsPerShareLineItems_C24543A86F74AF1DB0EA35F5D69015B2" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_EarningsPerShareTable_71AB0858BA90B15782C135F5D690E18F" xlink:to="loc_lnth_EarningsPerShareLineItems_C24543A86F74AF1DB0EA35F5D69015B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_68E02C4829F3B8F3A4A035F5D690E306" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_EarningsPerShareLineItems_C24543A86F74AF1DB0EA35F5D69015B2" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_68E02C4829F3B8F3A4A035F5D690E306" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_1AF7FF614405E72B619335F5D6902AFD" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_EarningsPerShareLineItems_C24543A86F74AF1DB0EA35F5D69015B2" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_1AF7FF614405E72B619335F5D6902AFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_749D941A263A80994D2635F5D690D600" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_EarningsPerShareLineItems_C24543A86F74AF1DB0EA35F5D69015B2" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_749D941A263A80994D2635F5D690D600" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_IncrementalCommonSharesAttributableToRestrictedStockAwards" xlink:label="loc_lnth_IncrementalCommonSharesAttributableToRestrictedStockAwards_54E4BE2D8E578A687CF135F5D690869F" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_EarningsPerShareLineItems_C24543A86F74AF1DB0EA35F5D69015B2" xlink:to="loc_lnth_IncrementalCommonSharesAttributableToRestrictedStockAwards_54E4BE2D8E578A687CF135F5D690869F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_55A9FB933BB0781A033B35F5D690CF67" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_EarningsPerShareLineItems_C24543A86F74AF1DB0EA35F5D69015B2" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_55A9FB933BB0781A033B35F5D690CF67" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_2C9C46B6A15390F0D6AE35F5D6902E80" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_EarningsPerShareLineItems_C24543A86F74AF1DB0EA35F5D69015B2" xlink:to="loc_us-gaap_EarningsPerShareBasic_2C9C46B6A15390F0D6AE35F5D6902E80" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_59FF1F0C2321E95AB27E35F5D691867B" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_EarningsPerShareLineItems_C24543A86F74AF1DB0EA35F5D69015B2" xlink:to="loc_us-gaap_EarningsPerShareDiluted_59FF1F0C2321E95AB27E35F5D691867B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_F70D079F46ED62DF9C4435F5D6919C32" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_EarningsPerShareLineItems_C24543A86F74AF1DB0EA35F5D69015B2" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_F70D079F46ED62DF9C4435F5D6919C32" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/NetIncomePerCommonShareTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_FAB979B79FF45D33B174588BC78F7899" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_561A9382E9135BE485802E7A48A8DF65" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_FAB979B79FF45D33B174588BC78F7899" xlink:to="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_561A9382E9135BE485802E7A48A8DF65" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/OtherIncomeExpense" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherIncomeAndExpensesAbstract" xlink:label="loc_us-gaap_OtherIncomeAndExpensesAbstract_11251F27F64848EFF586E872DC3F86DB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherIncomeAndOtherExpenseDisclosureTextBlock" xlink:label="loc_us-gaap_OtherIncomeAndOtherExpenseDisclosureTextBlock_AC2F914EA811174B14FBE872DC3F56C2" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_11251F27F64848EFF586E872DC3F86DB" xlink:to="loc_us-gaap_OtherIncomeAndOtherExpenseDisclosureTextBlock_AC2F914EA811174B14FBE872DC3F56C2" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/OtherIncomeScheduleOfOtherIncomeDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherIncomeAndExpensesAbstract" xlink:label="loc_us-gaap_OtherIncomeAndExpensesAbstract_7A8B9C0CDB0FBB07203F35F5D6791E54" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_E39B1A44A675E85782D135F5D679509D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_7A8B9C0CDB0FBB07203F35F5D6791E54" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_E39B1A44A675E85782D135F5D679509D" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_TaxIndemnificationIncomeLoss" xlink:label="loc_lnth_TaxIndemnificationIncomeLoss_3CE04920886CEC48A88835F5D6799693" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_7A8B9C0CDB0FBB07203F35F5D6791E54" xlink:to="loc_lnth_TaxIndemnificationIncomeLoss_3CE04920886CEC48A88835F5D6799693" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNonoperatingIncome" xlink:label="loc_us-gaap_OtherNonoperatingIncome_F39B3BBAB4F4A54B48D835F5D67AC78B" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_7A8B9C0CDB0FBB07203F35F5D6791E54" xlink:to="loc_us-gaap_OtherNonoperatingIncome_F39B3BBAB4F4A54B48D835F5D67AC78B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_A60B6A02A17D7D167A6635F5D67A0038" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTotalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_7A8B9C0CDB0FBB07203F35F5D6791E54" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_A60B6A02A17D7D167A6635F5D67A0038" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/OtherIncomeTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherIncomeAndExpensesAbstract" xlink:label="loc_us-gaap_OtherIncomeAndExpensesAbstract_A91E57F5C081AD72B8B4E872DC386E07" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock_44E092C756AA17CA4044E872DC385A29" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract_A91E57F5C081AD72B8B4E872DC386E07" xlink:to="loc_us-gaap_ScheduleOfOtherNonoperatingIncomeExpenseTableTextBlock_44E092C756AA17CA4044E872DC385A29" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/PropertyPlantEquipmentNet" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAbstract_A008A7427BDE55E3AFFA277EA0B94732" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_0007CC1F0D1C527AA73D29D3809F7139" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAbstract_A008A7427BDE55E3AFFA277EA0B94732" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_0007CC1F0D1C527AA73D29D3809F7139" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/PropertyPlantEquipmentNetAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAbstract_73FBF4EADF9D0063F66535F5D70ECCA1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_3845E18E6511026647AC35F5D70E4E8E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAbstract_73FBF4EADF9D0063F66535F5D70ECCA1" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_3845E18E6511026647AC35F5D70E4E8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_2257AF2C5F588EBDE49B35F5D70EEF48" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_3845E18E6511026647AC35F5D70E4E8E" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_2257AF2C5F588EBDE49B35F5D70EEF48" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_F50418D054DFBA8E5AE035F5D70E5ABC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_2257AF2C5F588EBDE49B35F5D70EEF48" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_F50418D054DFBA8E5AE035F5D70E5ABC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentMember" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentMember_18872B6E5C58C0D9248C35F5D70E814B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_F50418D054DFBA8E5AE035F5D70E5ABC" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentMember_18872B6E5C58C0D9248C35F5D70E814B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5B24FF1F61751E984F3335F5D70EE1DD" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_3845E18E6511026647AC35F5D70E4E8E" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5B24FF1F61751E984F3335F5D70EE1DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_D1F69F60D02199E5190235F5D70E8029" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5B24FF1F61751E984F3335F5D70EE1DD" xlink:to="loc_us-gaap_DepreciationAndAmortization_D1F69F60D02199E5190235F5D70E8029" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/PropertyPlantEquipmentNetScheduleOfPropertyPlantEquipmentNetDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAbstract_72A87C8A961F7253D173E872DCE34FF1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_46BFF8D9F92D4F4EE9A7E872DCE3A613" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAbstract_72A87C8A961F7253D173E872DCE34FF1" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_46BFF8D9F92D4F4EE9A7E872DCE3A613" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_BD191E91B88C6E952936E872DCE36998" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_46BFF8D9F92D4F4EE9A7E872DCE3A613" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_BD191E91B88C6E952936E872DCE36998" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_778D53054740A6FA67A0E872DCE36C21" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_BD191E91B88C6E952936E872DCE36998" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_778D53054740A6FA67A0E872DCE36C21" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LandMember" xlink:label="loc_us-gaap_LandMember_622526ED371642D163E6E872DCE31B23" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_778D53054740A6FA67A0E872DCE36C21" xlink:to="loc_us-gaap_LandMember_622526ED371642D163E6E872DCE31B23" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BuildingMember" xlink:label="loc_us-gaap_BuildingMember_3F759D395B461DB1F370E872DCE4F336" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_778D53054740A6FA67A0E872DCE36C21" xlink:to="loc_us-gaap_BuildingMember_3F759D395B461DB1F370E872DCE4F336" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_MachineryEquipmentAndFixturesMember" xlink:label="loc_lnth_MachineryEquipmentAndFixturesMember_9879EEC02DEF30FBF75DE872DCE4A3F6" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_778D53054740A6FA67A0E872DCE36C21" xlink:to="loc_lnth_MachineryEquipmentAndFixturesMember_9879EEC02DEF30FBF75DE872DCE4A3F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SoftwareAndSoftwareDevelopmentCostsMember" xlink:label="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_F4322CF0292CF4378238E872DCE40233" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_778D53054740A6FA67A0E872DCE36C21" xlink:to="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_F4322CF0292CF4378238E872DCE40233" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConstructionInProgressMember" xlink:label="loc_us-gaap_ConstructionInProgressMember_73AD592F4653ED6FF379E872DCE47D57" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_778D53054740A6FA67A0E872DCE36C21" xlink:to="loc_us-gaap_ConstructionInProgressMember_73AD592F4653ED6FF379E872DCE47D57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5BF0AF3C44AB30F0029BE872DCE44013" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_46BFF8D9F92D4F4EE9A7E872DCE3A613" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5BF0AF3C44AB30F0029BE872DCE44013" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_44272E040DFD2E2BF839E872DCE492BE" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5BF0AF3C44AB30F0029BE872DCE44013" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_44272E040DFD2E2BF839E872DCE492BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_3E99BEBC083B667DEAA2E872DCE42D2A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5BF0AF3C44AB30F0029BE872DCE44013" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_3E99BEBC083B667DEAA2E872DCE42D2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_4B9AF8846B9B412EEAD4E872DCE4AE7F" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_5BF0AF3C44AB30F0029BE872DCE44013" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_4B9AF8846B9B412EEAD4E872DCE4AE7F" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/PropertyPlantEquipmentNetTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAbstract_949384B9C84F5F19B6F4A964A7F60327" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_1CB5418ADABA53C0BE67E05A6ADEB1EF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAbstract_949384B9C84F5F19B6F4A964A7F60327" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_1CB5418ADABA53C0BE67E05A6ADEB1EF" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/RelatedPartyTransactions" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="loc_us-gaap_RelatedPartyTransactionsAbstract_124756E1BCDA52AF8FB20D5BDEEC6EED" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:label="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_95480ADB706F58E08F153A77D6C630E5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyTransactionsAbstract_124756E1BCDA52AF8FB20D5BDEEC6EED" xlink:to="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_95480ADB706F58E08F153A77D6C630E5" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/RelatedPartyTransactionsSummaryOfRelatedPartyExpensesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="loc_us-gaap_RelatedPartyTransactionsAbstract_6526448AED29304B59E135F5D667A7CB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_13AF5E8D7BF3336BC57F35F5D6676D84" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyTransactionsAbstract_6526448AED29304B59E135F5D667A7CB" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_13AF5E8D7BF3336BC57F35F5D6676D84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_B88C64BC86657C6521E435F5D6672E6F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_13AF5E8D7BF3336BC57F35F5D6676D84" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_B88C64BC86657C6521E435F5D6672E6F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_4636C9CA346CBCB1343735F5D667008F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_B88C64BC86657C6521E435F5D6672E6F" xlink:to="loc_us-gaap_RelatedPartyDomain_4636C9CA346CBCB1343735F5D667008F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MajorityShareholderMember" xlink:label="loc_us-gaap_MajorityShareholderMember_D6EF8F4DE0281558BEF435F5D66788C1" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyDomain_4636C9CA346CBCB1343735F5D667008F" xlink:to="loc_us-gaap_MajorityShareholderMember_D6EF8F4DE0281558BEF435F5D66788C1" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_VWRScientificMember" xlink:label="loc_lnth_VWRScientificMember_0C3422F0F62901A5044B35F5D66702F5" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyDomain_4636C9CA346CBCB1343735F5D667008F" xlink:to="loc_lnth_VWRScientificMember_0C3422F0F62901A5044B35F5D66702F5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TransactionTypeAxis" xlink:label="loc_us-gaap_TransactionTypeAxis_7790C550DA7E8873796A35F5D667E2F7" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_13AF5E8D7BF3336BC57F35F5D6676D84" xlink:to="loc_us-gaap_TransactionTypeAxis_7790C550DA7E8873796A35F5D667E2F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TransactionDomain" xlink:label="loc_us-gaap_TransactionDomain_78B8C507DA15CF36A1E635F5D6689487" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransactionTypeAxis_7790C550DA7E8873796A35F5D667E2F7" xlink:to="loc_us-gaap_TransactionDomain_78B8C507DA15CF36A1E635F5D6689487" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_OfferingCostsPaidPursuantToRegistrationRightsAgreementMember" xlink:label="loc_lnth_OfferingCostsPaidPursuantToRegistrationRightsAgreementMember_436CE09602F4E23C81EC35F5D6685A12" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransactionDomain_78B8C507DA15CF36A1E635F5D6689487" xlink:to="loc_lnth_OfferingCostsPaidPursuantToRegistrationRightsAgreementMember_436CE09602F4E23C81EC35F5D6685A12" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_PharmacovigilanceMember" xlink:label="loc_lnth_PharmacovigilanceMember_AA690423814E989CA7DB35F5D6681FC5" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransactionDomain_78B8C507DA15CF36A1E635F5D6689487" xlink:to="loc_lnth_PharmacovigilanceMember_AA690423814E989CA7DB35F5D6681FC5" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_InventorySuppliesMember" xlink:label="loc_lnth_InventorySuppliesMember_ECC3F892ABC956B1789735F5D6688EFD" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransactionDomain_78B8C507DA15CF36A1E635F5D6689487" xlink:to="loc_lnth_InventorySuppliesMember_ECC3F892ABC956B1789735F5D6688EFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_9E5A707769D45E418EEE35F5D668A036" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_13AF5E8D7BF3336BC57F35F5D6676D84" xlink:to="loc_dei_LegalEntityAxis_9E5A707769D45E418EEE35F5D668A036" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_AA8196661B5D5454D67235F5D668CA54" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_9E5A707769D45E418EEE35F5D668A036" xlink:to="loc_dei_EntityDomain_AA8196661B5D5454D67235F5D668CA54" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_INCResearchLLCMember" xlink:label="loc_lnth_INCResearchLLCMember_7D5481ECD5727993FE1335F5D66809DC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityDomain_AA8196661B5D5454D67235F5D668CA54" xlink:to="loc_lnth_INCResearchLLCMember_7D5481ECD5727993FE1335F5D66809DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_10DC440A232FD19AA61235F5D6681D5F" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_13AF5E8D7BF3336BC57F35F5D6676D84" xlink:to="loc_us-gaap_RelatedPartyTransactionLineItems_10DC440A232FD19AA61235F5D6681D5F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" xlink:label="loc_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_D70170FE02F89D65596C35F5D668C27F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_10DC440A232FD19AA61235F5D6681D5F" xlink:to="loc_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_D70170FE02F89D65596C35F5D668C27F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DistributionMadeToLimitedPartnerUnitDistribution" xlink:label="loc_us-gaap_DistributionMadeToLimitedPartnerUnitDistribution_5DD51A5349AC9C182150365BF6D1983E" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_10DC440A232FD19AA61235F5D6681D5F" xlink:to="loc_us-gaap_DistributionMadeToLimitedPartnerUnitDistribution_5DD51A5349AC9C182150365BF6D1983E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/RelatedPartyTransactionsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="loc_us-gaap_RelatedPartyTransactionsAbstract_38FE324CA1A054D2BFF43E21AC7736D4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_1038EA168BC056BB8E87C625E101BB03" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyTransactionsAbstract_38FE324CA1A054D2BFF43E21AC7736D4" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_1038EA168BC056BB8E87C625E101BB03" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/SegmentInformation" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_0297E35D83B3576EBEE3D93555401912" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_5F57A5D2BBD85A10951FE653147E99FF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_0297E35D83B3576EBEE3D93555401912" xlink:to="loc_us-gaap_SegmentReportingDisclosureTextBlock_5F57A5D2BBD85A10951FE653147E99FF" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/SegmentInformationAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_0D7B687DE0F05538933A95F5A873BEF7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="loc_us-gaap_NumberOfOperatingSegments_FF9237F9F910596382C1098C9AA2F35D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_0D7B687DE0F05538933A95F5A873BEF7" xlink:to="loc_us-gaap_NumberOfOperatingSegments_FF9237F9F910596382C1098C9AA2F35D" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/SegmentInformationScheduleOfSelectedInformationForEachBusinessSegmentDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_081E0BD061EB0E3D804F72EABF24FC8A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_E24F5726B5AEC17EF29372EABF24FE9F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_081E0BD061EB0E3D804F72EABF24FC8A" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_E24F5726B5AEC17EF29372EABF24FE9F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_694AF70C1B5BC0B8797472EABF2520CA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_E24F5726B5AEC17EF29372EABF24FE9F" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_694AF70C1B5BC0B8797472EABF2520CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_4E36814500207C00C45F72EABF25A0A9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_694AF70C1B5BC0B8797472EABF2520CA" xlink:to="loc_us-gaap_SegmentDomain_4E36814500207C00C45F72EABF25A0A9" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_UsSegmentMember" xlink:label="loc_lnth_UsSegmentMember_2AACC5A68DF79D56650172EABF2562BD" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_4E36814500207C00C45F72EABF25A0A9" xlink:to="loc_lnth_UsSegmentMember_2AACC5A68DF79D56650172EABF2562BD" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_InternationalSegmentMember" xlink:label="loc_lnth_InternationalSegmentMember_3C7601E11B3292B91AD372EABF273026" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_4E36814500207C00C45F72EABF25A0A9" xlink:to="loc_lnth_InternationalSegmentMember_3C7601E11B3292B91AD372EABF273026" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_993DCBD80F961668E84D72EABF27CD3F" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_E24F5726B5AEC17EF29372EABF24FE9F" xlink:to="loc_us-gaap_SegmentReportingInformationLineItems_993DCBD80F961668E84D72EABF27CD3F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_8439B97DBCC0A61C54EA72EABF278D6E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_993DCBD80F961668E84D72EABF27CD3F" xlink:to="loc_us-gaap_Revenues_8439B97DBCC0A61C54EA72EABF278D6E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract" xlink:label="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_C1DDE3C519C03234B4C872EABF2887BA" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_993DCBD80F961668E84D72EABF27CD3F" xlink:to="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_C1DDE3C519C03234B4C872EABF2887BA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_95A6170DADB018503D4572EABF287A50" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_C1DDE3C519C03234B4C872EABF2887BA" xlink:to="loc_us-gaap_OperatingIncomeLoss_95A6170DADB018503D4572EABF287A50" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_95F5E1B52B5C79A76E8D72EABF2870C0" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_C1DDE3C519C03234B4C872EABF2887BA" xlink:to="loc_us-gaap_InterestExpense_95F5E1B52B5C79A76E8D72EABF2870C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_0DDF426E21408263B03372F2464C581C" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_C1DDE3C519C03234B4C872EABF2887BA" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_0DDF426E21408263B03372F2464C581C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebtBeforeWriteOffOfDeferredDebtIssuanceCost" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebtBeforeWriteOffOfDeferredDebtIssuanceCost_C9963A6B366265950EBD72F5149B7F32" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_C1DDE3C519C03234B4C872EABF2887BA" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebtBeforeWriteOffOfDeferredDebtIssuanceCost_C9963A6B366265950EBD72F5149B7F32" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_CECCE7F1BE032B7D276272EABF281C9A" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_C1DDE3C519C03234B4C872EABF2887BA" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_CECCE7F1BE032B7D276272EABF281C9A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_A4FBFD784FBFA9F25AC072EABF28D76E" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_C1DDE3C519C03234B4C872EABF2887BA" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_A4FBFD784FBFA9F25AC072EABF28D76E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/SegmentInformationTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_5D6E84F2C8A014AB408DECCD4A1118B1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_4ADDAC17621F877DF778ECCD4A1163D7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_5D6E84F2C8A014AB408DECCD4A1118B1" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_4ADDAC17621F877DF778ECCD4A1163D7" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/StockBasedCompensation" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_BC8765666D505987BC2DEA848D998A0D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_1A529B60DF425AF7ADF291C5D7EC28E8" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_BC8765666D505987BC2DEA848D998A0D" xlink:to="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_1A529B60DF425AF7ADF291C5D7EC28E8" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/StockBasedCompensationAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_7A08653405A947C3400B7E14FF6E52BB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0C34D1556766386676577E14FF6E65D3" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_7A08653405A947C3400B7E14FF6E52BB" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0C34D1556766386676577E14FF6E65D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_4564B6B6846513625BC07E14FF6E04C5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0C34D1556766386676577E14FF6E65D3" xlink:to="loc_us-gaap_PlanNameAxis_4564B6B6846513625BC07E14FF6E04C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_9AC0DD468E2028BD285B7E14FF6E0786" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameAxis_4564B6B6846513625BC07E14FF6E04C5" xlink:to="loc_us-gaap_PlanNameDomain_9AC0DD468E2028BD285B7E14FF6E0786" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_TwoThousandAndFifteenEquityIncentivePlanMember" xlink:label="loc_lnth_TwoThousandAndFifteenEquityIncentivePlanMember_B54314C88C49E1D6571C7E14FF6E7EB9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameDomain_9AC0DD468E2028BD285B7E14FF6E0786" xlink:to="loc_lnth_TwoThousandAndFifteenEquityIncentivePlanMember_B54314C88C49E1D6571C7E14FF6E7EB9" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_TwoThousandSeventeenEmployeeStockPurchasePlanMember" xlink:label="loc_lnth_TwoThousandSeventeenEmployeeStockPurchasePlanMember_ACFA6422F37CA675A7DF7E14FF6E2C53" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameDomain_9AC0DD468E2028BD285B7E14FF6E0786" xlink:to="loc_lnth_TwoThousandSeventeenEmployeeStockPurchasePlanMember_ACFA6422F37CA675A7DF7E14FF6E2C53" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACC10FCD348A6A8A91B77E14FF6E5C2D" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0C34D1556766386676577E14FF6E65D3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACC10FCD348A6A8A91B77E14FF6E5C2D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_B00F69DB47297F1BBDEA7E14FF6EA62C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACC10FCD348A6A8A91B77E14FF6E5C2D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_B00F69DB47297F1BBDEA7E14FF6EA62C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_E60E83DA33297D22D7247E14FF6E2BA4" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACC10FCD348A6A8A91B77E14FF6E5C2D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_E60E83DA33297D22D7247E14FF6E2BA4" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_EmployeeStockPurchasePlanOfferingPeriod" xlink:label="loc_lnth_EmployeeStockPurchasePlanOfferingPeriod_19A59919B0430FE937167E14FF6EF932" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACC10FCD348A6A8A91B77E14FF6E5C2D" xlink:to="loc_lnth_EmployeeStockPurchasePlanOfferingPeriod_19A59919B0430FE937167E14FF6EF932" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_EmployeeStockPurchasePlanDiscountPercentage" xlink:label="loc_lnth_EmployeeStockPurchasePlanDiscountPercentage_F44725D98BE696102E3C7E14FF6EAFB0" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ACC10FCD348A6A8A91B77E14FF6E5C2D" xlink:to="loc_lnth_EmployeeStockPurchasePlanDiscountPercentage_F44725D98BE696102E3C7E14FF6EAFB0" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/StockBasedCompensationScheduleOfStockBasedCompensationExpenseRecognizedDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B13067B4AA0CF4F52ECBE872DC68AC0A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_244F63E8CB8A97C83696E872DC68852E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_B13067B4AA0CF4F52ECBE872DC68AC0A" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_244F63E8CB8A97C83696E872DC68852E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_6ABD7EE80221953F074BE872DC684952" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_244F63E8CB8A97C83696E872DC68852E" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_6ABD7EE80221953F074BE872DC684952" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_67F2FBF6560AB4A3EB44E872DC684053" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_6ABD7EE80221953F074BE872DC684952" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_67F2FBF6560AB4A3EB44E872DC684053" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_202E1A18081D9D3A9A19E872DC684FB0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_67F2FBF6560AB4A3EB44E872DC684053" xlink:to="loc_us-gaap_CostOfSalesMember_202E1A18081D9D3A9A19E872DC684FB0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SellingAndMarketingExpenseMember" xlink:label="loc_us-gaap_SellingAndMarketingExpenseMember_CBDA3C55BCBED6B0233FE872DC683B15" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_67F2FBF6560AB4A3EB44E872DC684053" xlink:to="loc_us-gaap_SellingAndMarketingExpenseMember_CBDA3C55BCBED6B0233FE872DC683B15" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GeneralAndAdministrativeExpenseMember" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_84FD06CA5DB6A36AFAABE872DC68C474" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_67F2FBF6560AB4A3EB44E872DC684053" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpenseMember_84FD06CA5DB6A36AFAABE872DC68C474" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_A080352A5716E66E17BEE872DC68037D" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_67F2FBF6560AB4A3EB44E872DC684053" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_A080352A5716E66E17BEE872DC68037D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CB2C0BEFC4FCFAA619A5E872DC68CA70" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_244F63E8CB8A97C83696E872DC68852E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CB2C0BEFC4FCFAA619A5E872DC68CA70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_FD2B136319D837283F15E872DC68B118" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CB2C0BEFC4FCFAA619A5E872DC68CA70" xlink:to="loc_us-gaap_ShareBasedCompensation_FD2B136319D837283F15E872DC68B118" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/StockBasedCompensationTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_94344769B2815432A9C365E110AE4DEC" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_B3668551598E5656926C4A8950098345" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_94344769B2815432A9C365E110AE4DEC" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_B3668551598E5656926C4A8950098345" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/SubsequentEventsNotes" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="loc_us-gaap_SubsequentEventsAbstract_0500493398D690AEF69D6F3CAC3AEC5E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="loc_us-gaap_SubsequentEventsTextBlock_6CA1FABCF69430AB0ED76F3D6A33BB19" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventsAbstract_0500493398D690AEF69D6F3CAC3AEC5E" xlink:to="loc_us-gaap_SubsequentEventsTextBlock_6CA1FABCF69430AB0ED76F3D6A33BB19" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/SummaryOfSignificantAccountingPolicies" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_6D00BDA0455E5B0C95C71FF5922F4EDD" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:label="loc_us-gaap_SignificantAccountingPoliciesTextBlock_CD96644E824259F691321ED35E0797E4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_6D00BDA0455E5B0C95C71FF5922F4EDD" xlink:to="loc_us-gaap_SignificantAccountingPoliciesTextBlock_CD96644E824259F691321ED35E0797E4" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_680D6980C26465A2D77DECCD4A767905" xlink:type="locator" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_ScheduleOfAccountingPoliciesTable" xlink:label="loc_lnth_ScheduleOfAccountingPoliciesTable_876E55ACAEE38F621E51ECCD4A764A12" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_680D6980C26465A2D77DECCD4A767905" xlink:to="loc_lnth_ScheduleOfAccountingPoliciesTable_876E55ACAEE38F621E51ECCD4A764A12" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="loc_us-gaap_TypeOfArrangementAxis_F3FEF0241F099D3BDD67ECCD4A7651BC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_ScheduleOfAccountingPoliciesTable_876E55ACAEE38F621E51ECCD4A764A12" xlink:to="loc_us-gaap_TypeOfArrangementAxis_F3FEF0241F099D3BDD67ECCD4A7651BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_2207D6477451754ECE64ECCD4A767681" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TypeOfArrangementAxis_F3FEF0241F099D3BDD67ECCD4A7651BC" xlink:to="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_2207D6477451754ECE64ECCD4A767681" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CollaborativeArrangementProductAgreementMember" xlink:label="loc_us-gaap_CollaborativeArrangementProductAgreementMember_D23AB0266BBDB8CF1388ECCD4A762180" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember_2207D6477451754ECE64ECCD4A767681" xlink:to="loc_us-gaap_CollaborativeArrangementProductAgreementMember_D23AB0266BBDB8CF1388ECCD4A762180" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_568637FB58D6BB43B694ECCD4A7672FF" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_ScheduleOfAccountingPoliciesTable_876E55ACAEE38F621E51ECCD4A764A12" xlink:to="loc_dei_LegalEntityAxis_568637FB58D6BB43B694ECCD4A7672FF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_12AF8BB994EAF37FC4B4ECCD4A769404" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_LegalEntityAxis_568637FB58D6BB43B694ECCD4A7672FF" xlink:to="loc_dei_EntityDomain_12AF8BB994EAF37FC4B4ECCD4A769404" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_GEHealthcareLimitedMember" xlink:label="loc_lnth_GEHealthcareLimitedMember_449C4073F5A441825316ECCD4A77EADF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityDomain_12AF8BB994EAF37FC4B4ECCD4A769404" xlink:to="loc_lnth_GEHealthcareLimitedMember_449C4073F5A441825316ECCD4A77EADF" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_ScheduleOfAccountingPoliciesLineItems" xlink:label="loc_lnth_ScheduleOfAccountingPoliciesLineItems_893173F477B8499007D2ECCD4A77981D" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_ScheduleOfAccountingPoliciesTable_876E55ACAEE38F621E51ECCD4A764A12" xlink:to="loc_lnth_ScheduleOfAccountingPoliciesLineItems_893173F477B8499007D2ECCD4A77981D" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_UpfrontCashPaymentUnderLicenseAgreement" xlink:label="loc_lnth_UpfrontCashPaymentUnderLicenseAgreement_B4D7970FCF113B5F4857ECCD4A773A04" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_ScheduleOfAccountingPoliciesLineItems_893173F477B8499007D2ECCD4A77981D" xlink:to="loc_lnth_UpfrontCashPaymentUnderLicenseAgreement_B4D7970FCF113B5F4857ECCD4A773A04" xlink:type="arc" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_RevenueRecognitionMilestoneMethodExpectedMilestoneReceivables" xlink:label="loc_lnth_RevenueRecognitionMilestoneMethodExpectedMilestoneReceivables_7FDAE808D362F0170D69ECCD4A772B29" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_ScheduleOfAccountingPoliciesLineItems_893173F477B8499007D2ECCD4A77981D" xlink:to="loc_lnth_RevenueRecognitionMilestoneMethodExpectedMilestoneReceivables_7FDAE808D362F0170D69ECCD4A772B29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized" xlink:label="loc_us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized_A7C24AB896430067B68FECCD4A77887A" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_lnth_ScheduleOfAccountingPoliciesLineItems_893173F477B8499007D2ECCD4A77981D" xlink:to="loc_us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized_A7C24AB896430067B68FECCD4A77887A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.lantheus.com/role/SummaryOfSignificantAccountingPoliciesRecentAccountingPronouncementsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_D4AC996B01BD22207D783688925806F2" xlink:type="locator" />
    <link:loc xlink:href="lnth-20170930.xsd#lnth_RecentAccountingPronouncementsTableTextBlock" xlink:label="loc_lnth_RecentAccountingPronouncementsTableTextBlock_B6E925CB5B9AC97B6D9D36890D36EF0A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_D4AC996B01BD22207D783688925806F2" xlink:to="loc_lnth_RecentAccountingPronouncementsTableTextBlock_B6E925CB5B9AC97B6D9D36890D36EF0A" xlink:type="arc" />
  </link:presentationLink>
</link:linkbase>
