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        <link:definition>163 - Disclosure - Difference between Benefit from Income Taxes and Amount Computed by Applying Statutory Income Tax Rate to Income Before Taxes (Detail)</link:definition>
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        <link:definition>167 - Disclosure - Stock Option Activity (Detail)</link:definition>
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        <link:definition>170 - Disclosure - Stock-Based Compensation Expense Related to Option Awards (Detail)</link:definition>
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        <link:definition>171 - Disclosure - Defined Contribution Plans - Additional Information (Detail)</link:definition>
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        <link:definition>172 - Disclosure - Related Party Transaction - Additional Information (Detail)</link:definition>
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  <element name="DebtExchangeMember" id="amrn_DebtExchangeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DebtInstrumentMaturityDateYear" id="amrn_DebtInstrumentMaturityDateYear" type="xbrli:gYearItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DebtIssuanceCostsPolicyTextBlock" id="amrn_DebtIssuanceCostsPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DeferredTaxAssetsDepreciationAndAmortization" id="amrn_DeferredTaxAssetsDepreciationAndAmortization" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DeferredTaxAssetsOperatingLossCarryforwardsChangeInAmount" id="amrn_DeferredTaxAssetsOperatingLossCarryforwardsChangeInAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DeferredTaxAssetsTaxCreditCarryforwardsResultingFromExcessTaxBenefitsOfStockbasedCompensation" id="amrn_DeferredTaxAssetsTaxCreditCarryforwardsResultingFromExcessTaxBenefitsOfStockbasedCompensation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DeferredTaxLiabilitiesSubjectToExpiration" id="amrn_DeferredTaxLiabilitiesSubjectToExpiration" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DerivativeLiabilitiesTransferredToEquityClassifications" id="amrn_DerivativeLiabilitiesTransferredToEquityClassifications" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DerivativeLiabilitiesTransferredToStockholdersEquity" id="amrn_DerivativeLiabilitiesTransferredToStockholdersEquity" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DocumentAndEntityInformationAbstract" id="amrn_DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DublinMember" id="amrn_DublinMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="EarningsLossPerShareLineItems" id="amrn_EarningsLossPerShareLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="EarningsLossPerShareTable" id="amrn_EarningsLossPerShareTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="EddingpharmMember" id="amrn_EddingpharmMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="EligibleMilestonePayment" id="amrn_EligibleMilestonePayment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="EquityIssuancePerShareAmount1" id="amrn_EquityIssuancePerShareAmount1" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="EquityOfferingCosts" id="amrn_EquityOfferingCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExcessPrincipalValueOverFairValue" id="amrn_ExcessPrincipalValueOverFairValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExcessTaxBenefitTaxDeficiencyFromShareBasedCompensationFinancingActivities" id="amrn_ExcessTaxBenefitTaxDeficiencyFromShareBasedCompensationFinancingActivities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ExcessTaxBenefitTaxDeficiencyFromShareBasedCompensationOperatingActivities" id="amrn_ExcessTaxBenefitTaxDeficiencyFromShareBasedCompensationOperatingActivities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="FairValueAssumptionsComparableYieldToMaturity" id="amrn_FairValueAssumptionsComparableYieldToMaturity" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="FairValueAssumptionsCouponRate" id="amrn_FairValueAssumptionsCouponRate" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="FirstPrivatePlacementMember" id="amrn_FirstPrivatePlacementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="FountainHealthcarePartnersFundOneLimitedPartnershipMember" id="amrn_FountainHealthcarePartnersFundOneLimitedPartnershipMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="FurtherIndicationForAmrOneZeroOneMember" id="amrn_FurtherIndicationForAmrOneZeroOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="FutureMinimumGuaranteePayments" id="amrn_FutureMinimumGuaranteePayments" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="GuaranteePayments" id="amrn_GuaranteePayments" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="IncomeTaxesLineItems" id="amrn_IncomeTaxesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="IncomeTaxesTable" id="amrn_IncomeTaxesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="IncomeTaxRateReconciliationCumulativeTranslationAdjustmentAmount" id="amrn_IncomeTaxRateReconciliationCumulativeTranslationAdjustmentAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="IncomeTaxReconciliationDerivativeLiabilities" id="amrn_IncomeTaxReconciliationDerivativeLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="IncomeTaxReconciliationGainLossOnExtinguishmentOfDebt" id="amrn_IncomeTaxReconciliationGainLossOnExtinguishmentOfDebt" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="IncreaseDecreaseInLeaseRelatedLiabilities" id="amrn_IncreaseDecreaseInLeaseRelatedLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="IntangibleAssetsDisclosureLineItems" id="amrn_IntangibleAssetsDisclosureLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="IntangibleAssetsDisclosureTable" id="amrn_IntangibleAssetsDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="IrelandAndUnitedKingdomMember" id="amrn_IrelandAndUnitedKingdomMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="KowaPharmaceuticalsAmericaMember" id="amrn_KowaPharmaceuticalsAmericaMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LaxdaleLimitedMember" id="amrn_LaxdaleLimitedMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LeaseAgreementMonthlyPayment" id="amrn_LeaseAgreementMonthlyPayment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LeasesDisclosureLineItems" id="amrn_LeasesDisclosureLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LeasesDisclosureTable" id="amrn_LeasesDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="LiabilitiesForCommitmentsAxis" id="amrn_LiabilitiesForCommitmentsAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem"/>
  <element name="LiabilitiesForCommitmentsDomain" id="amrn_LiabilitiesForCommitmentsDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LicenseAndCollaborationAgreementsLineItems" id="amrn_LicenseAndCollaborationAgreementsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LicenseAndCollaborationAgreementsTable" id="amrn_LicenseAndCollaborationAgreementsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="LicensingAgreementTerm" id="amrn_LicensingAgreementTerm" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="LocationAxis" id="amrn_LocationAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem"/>
  <element name="LocationsDomain" id="amrn_LocationsDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="MarketingApprovalInEuropeMember" id="amrn_MarketingApprovalInEuropeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NonCashMember" id="amrn_NonCashMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NonRefundableUpfrontPaymentsReceived" id="amrn_NonRefundableUpfrontPaymentsReceived" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NonTradingActivityMember" id="amrn_NonTradingActivityMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NumberOfLeasableSquareFeet" id="amrn_NumberOfLeasableSquareFeet" type="num:areaItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="NumberOfSalesRepresentative" id="amrn_NumberOfSalesRepresentative" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OctoberTwentyZeroNinePrivatePlacementMember" id="amrn_OctoberTwentyZeroNinePrivatePlacementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OperatingLeasesFutureMinimumPaymentsDueInFourYearsAndThereafter" id="amrn_OperatingLeasesFutureMinimumPaymentsDueInFourYearsAndThereafter" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OrbimedAdvisorsLimitedLiabilityCompanyMember" id="amrn_OrbimedAdvisorsLimitedLiabilityCompanyMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OrdinarySharesBasisMember" id="amrn_OrdinarySharesBasisMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OrdinarySharesMember" id="amrn_OrdinarySharesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" id="amrn_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" id="amrn_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="OtherDebtObligationsMember" id="amrn_OtherDebtObligationsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="OtherIncentiveProgramsMember" id="amrn_OtherIncentiveProgramsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PercentageOfOutstandingCommonSharesAndPreferredSharesOnFullyDilutedBasis" id="amrn_PercentageOfOutstandingCommonSharesAndPreferredSharesOnFullyDilutedBasis" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PerformanceBasedOptionsMember" id="amrn_PerformanceBasedOptionsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PerformanceBasedRestrictedStockUnitMember" id="amrn_PerformanceBasedRestrictedStockUnitMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PeriodAxis" id="amrn_PeriodAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem"/>
  <element name="PeriodDomain" id="amrn_PeriodDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PeriodOneMember" id="amrn_PeriodOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PeriodThreeMember" id="amrn_PeriodThreeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PeriodTwoMember" id="amrn_PeriodTwoMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PotentialMarketingApprovalOneMember" id="amrn_PotentialMarketingApprovalOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PotentialMarketingApprovalTwoMember" id="amrn_PotentialMarketingApprovalTwoMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PreferredSharesBasisMember" id="amrn_PreferredSharesBasisMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PreferredStockEquivalentOrdinarySharesUponFutureConversion" id="amrn_PreferredStockEquivalentOrdinarySharesUponFutureConversion" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PreferredStockPurchaseOption" id="amrn_PreferredStockPurchaseOption" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PreferredStockPurchaseOptionMember" id="amrn_PreferredStockPurchaseOptionMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PreferredStockWithBeneficialConversionFeature" id="amrn_PreferredStockWithBeneficialConversionFeature" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PriorToAgreementMember" id="amrn_PriorToAgreementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PrivatePlacementClosingDate" id="amrn_PrivatePlacementClosingDate" type="xbrli:dateItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PrivatePlacementIssuanceNumberOfTranches" id="amrn_PrivatePlacementIssuanceNumberOfTranches" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ProceedsFromRefundOfStockIssuanceCosts" id="amrn_ProceedsFromRefundOfStockIssuanceCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ProceedsFromWarrantExercisesGross" id="amrn_ProceedsFromWarrantExercisesGross" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="PropertyPlantAndEquipmentUsefulLifeTableTextBlock" id="amrn_PropertyPlantAndEquipmentUsefulLifeTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ProvisionRelatedToPriorPeriodSales" id="amrn_ProvisionRelatedToPriorPeriodSales" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="QuarterlyFinancialInformationLineItems" id="amrn_QuarterlyFinancialInformationLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="QuarterlyFinancialInformationTable" id="amrn_QuarterlyFinancialInformationTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="RangeOfPercentageOfGrossMarginPayableForCoPromotionAgreement" id="amrn_RangeOfPercentageOfGrossMarginPayableForCoPromotionAgreement" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RebatesChargebacksAndDiscountsMember" id="amrn_RebatesChargebacksAndDiscountsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ReclassificationOfDerivativeLiabilitiesToAdditionalPaidInCapital" id="amrn_ReclassificationOfDerivativeLiabilitiesToAdditionalPaidInCapital" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RenewalOptionTermsMaximumAdditionalPeriod" id="amrn_RenewalOptionTermsMaximumAdditionalPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RepublicOfIrelandUnitedKingdomAndIsraelMember" id="amrn_RepublicOfIrelandUnitedKingdomAndIsraelMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RepurchaseOfConversionOptionsOnLongTermDebt" id="amrn_RepurchaseOfConversionOptionsOnLongTermDebt" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ResearchAndDevelopmentAccruedExpenseCurrent" id="amrn_ResearchAndDevelopmentAccruedExpenseCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SecondPrivatePlacementMember" id="amrn_SecondPrivatePlacementMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SeniorNotesOneMember" id="amrn_SeniorNotesOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SeniorNotesThreeMember" id="amrn_SeniorNotesThreeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SeniorNotesTwoAndThreeMember" id="amrn_SeniorNotesTwoAndThreeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SeniorNotesTwoMember" id="amrn_SeniorNotesTwoMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" id="amrn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" id="amrn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationNet" id="amrn_ShareBasedCompensationNet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SignificantAccountingPoliciesLineItems" id="amrn_SignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SignificantAccountingPoliciesTable" id="amrn_SignificantAccountingPoliciesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="SofinnovaVenturePartnersVIILimitedPartnershipMember" id="amrn_SofinnovaVenturePartnersVIILimitedPartnershipMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SquareFeetSubleasedToThirdParty" id="amrn_SquareFeetSubleasedToThirdParty" type="num:areaItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SquareFeetVacated" id="amrn_SquareFeetVacated" type="num:areaItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StatutoryTaxRate" id="amrn_StatutoryTaxRate" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StockholdersEquityNoteLineItems" id="amrn_StockholdersEquityNoteLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StockholdersEquityNoteTable" id="amrn_StockholdersEquityNoteTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="StockIncentivePlanTwentyElevenMember" id="amrn_StockIncentivePlanTwentyElevenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StockIssuedDuringPeriodShareExerciseOfStockOptionsVestingOfRestrictedStock" id="amrn_StockIssuedDuringPeriodShareExerciseOfStockOptionsVestingOfRestrictedStock" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StockIssuedDuringPeriodSharesStockWarrantsExercised" id="amrn_StockIssuedDuringPeriodSharesStockWarrantsExercised" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StockIssuedDuringPeriodValueStockWarrantsExercised" id="amrn_StockIssuedDuringPeriodValueStockWarrantsExercised" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StockOptionsGrantedAfterJuneThirtyTwentyZeroNineMember" id="amrn_StockOptionsGrantedAfterJuneThirtyTwentyZeroNineMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StockOptionsGrantedPriorToJuneThirtyTwentyZeroNineMember" id="amrn_StockOptionsGrantedPriorToJuneThirtyTwentyZeroNineMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SubleaseMember" id="amrn_SubleaseMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SummaryOfNetProductRevenueValuationAllowancesTableTextBlock" id="amrn_SummaryOfNetProductRevenueValuationAllowancesTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TaxCreditCarryforwardExpirationYear" id="amrn_TaxCreditCarryforwardExpirationYear" type="xbrli:gYearItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TaxesByNatureAxis" id="amrn_TaxesByNatureAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem"/>
  <element name="TaxesByNatureDomain" id="amrn_TaxesByNatureDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TopThreeCustomerMember" id="amrn_TopThreeCustomerMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TradingActivityMember" id="amrn_TradingActivityMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="UseOfForecastedFinancialInformationInAccountingEstimatesPolicyTextBlock" id="amrn_UseOfForecastedFinancialInformationInAccountingEstimatesPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ValuationAllowancesAndReservesForeignCurrencyTranslation" id="amrn_ValuationAllowancesAndReservesForeignCurrencyTranslation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="VestingPeriodOneMember" id="amrn_VestingPeriodOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="VestingPeriodTwoMember" id="amrn_VestingPeriodTwoMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WarrantsIssuedJulyTwentyZeroNineMember" id="amrn_WarrantsIssuedJulyTwentyZeroNineMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WarrantsIssuedOctoberTwentyZeroNineMember" id="amrn_WarrantsIssuedOctoberTwentyZeroNineMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract" id="amrn_WeightedAverageNumberBasicAndDilutedSharesOutstandingAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WriteOffsOfAccountsReceivables" id="amrn_WriteOffsOfAccountsReceivables" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
</schema>


