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  <xs:element id="cpix_CaldolorMember" abstract="true" name="CaldolorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="cpix_PinnacleBankMember" abstract="true" name="PinnacleBankMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="cpix_ChargebacksCashDiscountsAndDamagedGoodsMember" abstract="true" name="ChargebacksCashDiscountsAndDamagedGoodsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="cpix_PrepaidsAndOtherCurrentAssetsPolicyPolicyTextBlock" abstract="false" name="PrepaidsAndOtherCurrentAssetsPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cpix_PaymentProtectionProgramMember" abstract="true" name="PaymentProtectionProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="cpix_LesseeOperatingLeaseRentIncrease" abstract="false" name="LesseeOperatingLeaseRentIncrease" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
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  <xs:element id="cpix_AccruedLiabilitiesInventoryPurchases" abstract="false" name="AccruedLiabilitiesInventoryPurchases" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_MelintaTherapeuticsLLCAndTargantaTherapeuticsCorporationMember" abstract="true" name="MelintaTherapeuticsLLCAndTargantaTherapeuticsCorporationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_RevenueRecognitionCumulativeUpfrontPayment" abstract="false" name="RevenueRecognitionCumulativeUpfrontPayment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkInProcessInventoryUnlabeledVials" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkInProcessInventoryUnlabeledVials" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_ProductSalesRelatedLiabilitiesCurrent" abstract="false" name="ProductSalesRelatedLiabilitiesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_StockIssuedDuringPeriodNewSharesUnderwritingDiscounts" abstract="false" name="StockIssuedDuringPeriodNewSharesUnderwritingDiscounts" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_ManufacturingAndSupplyAgreementsAbstract" abstract="true" name="ManufacturingAndSupplyAgreementsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cpix_TieredRoyaltyPaymentsPercentage" abstract="false" name="TieredRoyaltyPaymentsPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cpix_CustomerThreeMember" abstract="true" name="CustomerThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_ScheduleOfAdvertisingCostsTableTextBlock" abstract="false" name="ScheduleOfAdvertisingCostsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cpix_MethotrexateMember" abstract="true" name="MethotrexateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_CollaborativeArrangementMilestonePaymentThresholdAxis" abstract="true" name="CollaborativeArrangementMilestonePaymentThresholdAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="cpix_ShareRepurchaseProgramAuthorizedIn2010Member" abstract="true" name="ShareRepurchaseProgramAuthorizedIn2010Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRawMaterialsInventory" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRawMaterialsInventory" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_ExpirationTimePeriodDomain" abstract="true" name="ExpirationTimePeriodDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_CollaborativeArrangementFederalSmallBusinessGrantProgramsMember" abstract="true" name="CollaborativeArrangementFederalSmallBusinessGrantProgramsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_NordicMember" abstract="true" name="NordicMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_LongTermIncentiveCompensationPlan2007Member" abstract="true" name="LongTermIncentiveCompensationPlan2007Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_StockIssuedDuringPeriodShelfRegistrationProceedsFromSaleofCorporateSecurities" abstract="false" name="StockIssuedDuringPeriodShelfRegistrationProceedsFromSaleofCorporateSecurities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_AcetadoteMember" abstract="true" name="AcetadoteMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkInProcessInventoryValidationVials" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkInProcessInventoryValidationVials" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_RevenueRecognitionPotentialUpfrontPaymentsRelatedtoRegulatoryApproval" abstract="false" name="RevenueRecognitionPotentialUpfrontPaymentsRelatedtoRegulatoryApproval" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_LineOfCreditFacilityAdditionalBorrowingCapacity" abstract="false" name="LineOfCreditFacilityAdditionalBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cpix_CustomerOneMember" abstract="true" name="CustomerOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_VIBATIVMember" abstract="true" name="VIBATIVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cpix_KyowaKirinMember" abstract="true" name="KyowaKirinMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
