<?xml version="1.0" encoding="utf-8"?>
<!--XBRL document created with Toppan Merrill Bridge  11.3.0.1 -->
<!--Based on XBRL 2.1-->
<!--Created on: 5/11/2026 7:07:42 AM-->
<!--Modified on: 5/11/2026 7:07:42 AM-->
<xsd:schema xmlns:srt="http://fasb.org/srt/2025" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:stpr="http://xbrl.sec.gov/stpr/2025" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:us-gaap="http://fasb.org/us-gaap/2025" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://liquidia.com/20260331" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:us-roles="http://fasb.org/us-roles/2025" xmlns:ref="http://www.xbrl.org/2006/ref" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:utr="http://www.xbrl.org/2009/utr" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:attributeFormDefault="unqualified" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:deprecated="http://www.xbrl.org/2009/role/deprecated" xmlns:net="http://www.xbrl.org/2009/role/net" xmlns:dei="http://xbrl.sec.gov/dei/2025" xmlns:lqda="http://liquidia.com/20260331" xmlns:dtr="http://www.xbrl.org/2009/dtr" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:ecd="http://xbrl.sec.gov/ecd/2025" xmlns:ecd-sub="http://xbrl.sec.gov/ecd-sub/2025">
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-gaap/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/stpr/2025" schemaLocation="https://xbrl.sec.gov/stpr/2025/stpr-2025.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xsd:import namespace="http://fasb.org/srt/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd" />
  <xsd:import namespace="http://fasb.org/us-roles/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureStandardAndCustomAxisDomainDefaults" id="DisclosureStandardAndCustomAxisDomainDefaults">
        <link:definition>99900 - Disclosure - Standard And Custom Axis Domain Defaults</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/StatementCondensedConsolidatedBalanceSheets" id="StatementCondensedConsolidatedBalanceSheets">
        <link:definition>995200100 - Statement - Condensed Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/StatementCondensedConsolidatedStatementsOfOperationsAndComprehensiveLoss" id="StatementCondensedConsolidatedStatementsOfOperationsAndComprehensiveLoss">
        <link:definition>995200200 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Loss</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/StatementCondensedConsolidatedStatementsOfCashFlows" id="StatementCondensedConsolidatedStatementsOfCashFlows">
        <link:definition>995200400 - Statement - Condensed Consolidated Statements of Cash Flows</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureInventoryDetails" id="DisclosureInventoryDetails">
        <link:definition>99940301 - Disclosure - Inventory (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosurePropertyPlantAndEquipmentScheduleOfPropertyPlantAndEquipmentDetails" id="DisclosurePropertyPlantAndEquipmentScheduleOfPropertyPlantAndEquipmentDetails">
        <link:definition>99940401 - Disclosure - Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesDetails" id="DisclosureAccruedExpensesAndOtherCurrentLiabilitiesDetails">
        <link:definition>99940701 - Disclosure - Accrued Expenses and Other Current Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureLeasesCostDetails" id="DisclosureLeasesCostDetails">
        <link:definition>99941002 - Disclosure - Leases - Cost (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureLeasesLeaseLiabilityMaturitiesDetails" id="DisclosureLeasesLeaseLiabilityMaturitiesDetails">
        <link:definition>99941004 - Disclosure - Leases - Lease Liability Maturities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureLongTermDebtExpectedAnnualPaymentsDetails" id="DisclosureLongTermDebtExpectedAnnualPaymentsDetails">
        <link:definition>99941103 - Disclosure - Long-term Debt - Expected Annual Payments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureSegmentInformationDetails" id="DisclosureSegmentInformationDetails">
        <link:definition>99941501 - Disclosure - Segment Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DocumentDocumentAndEntityInformation" id="DocumentDocumentAndEntityInformation">
        <link:definition>995200090 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/StatementCondensedConsolidatedBalanceSheetsParentheticals" id="StatementCondensedConsolidatedBalanceSheetsParentheticals">
        <link:definition>995200105 - Statement - Condensed Consolidated Balance Sheets (Parentheticals)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/StatementCondensedConsolidatedStatementsOfStockholdersEquity" id="StatementCondensedConsolidatedStatementsOfStockholdersEquity">
        <link:definition>995200300 - Statement - Condensed Consolidated Statements of Stockholders' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureLegalProceedings" id="DisclosureLegalProceedings">
        <link:definition>995211401 - Disclosure - Legal Proceedings</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurementsTables" id="DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurementsTables">
        <link:definition>99930203 - Disclosure - Basis of Presentation, Significant Accounting Policies and Fair Value Measurements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureStockBasedCompensationTables" id="DisclosureStockBasedCompensationTables">
        <link:definition>99930903 - Disclosure - Stock-Based Compensation (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureBusinessLiquidityAndCapitalResourcesDetails" id="DisclosureBusinessLiquidityAndCapitalResourcesDetails">
        <link:definition>99940101 - Disclosure - Business - Liquidity and Capital Resources (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurementsOtherDetails" id="DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurementsOtherDetails">
        <link:definition>99940201 - Disclosure - Basis of Presentation, Significant Accounting Policies and Fair Value Measurements - Other (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurementsConcentrationOfCreditRiskDetails" id="DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurementsConcentrationOfCreditRiskDetails">
        <link:definition>99940202 - Disclosure - Basis of Presentation, Significant Accounting Policies and Fair Value Measurements - Concentration of Credit Risk (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurementsBasicAndDilutedNetIncomeLossPerShareDetails" id="DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurementsBasicAndDilutedNetIncomeLossPerShareDetails">
        <link:definition>99940203 - Disclosure - Basis of Presentation, Significant Accounting Policies and Fair Value Measurements - Basic and Diluted Net Income (Loss) Per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurementsCommonStockEquivalentSharesExcludedFromCalculationOfDilutedNetLossPerShareDetails" id="DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurementsCommonStockEquivalentSharesExcludedFromCalculationOfDilutedNetLossPerShareDetails">
        <link:definition>99940204 - Disclosure - Basis of Presentation, Significant Accounting Policies and Fair Value Measurements - Common Stock Equivalent Shares Excluded From Calculation of Diluted Net Loss Per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurementsFairValueOfFinancialAssetsAndFinancialLiabilitiesDetails" id="DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurementsFairValueOfFinancialAssetsAndFinancialLiabilitiesDetails">
        <link:definition>99940205 - Disclosure - Basis of Presentation, Significant Accounting Policies and Fair Value Measurements - Fair Value of Financial Assets and Financial Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosurePropertyPlantAndEquipmentExpenseDetails" id="DisclosurePropertyPlantAndEquipmentExpenseDetails">
        <link:definition>99940402 - Disclosure - Property, Plant and Equipment - Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureContractAcquisitionCostsAndIntangibleAssetOtherDetails" id="DisclosureContractAcquisitionCostsAndIntangibleAssetOtherDetails">
        <link:definition>99940502 - Disclosure - Contract Acquisition Costs and Intangible Asset - Other (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureIndemnificationAssetWithRelatedPartyAndLitigationFinancePayableDetails" id="DisclosureIndemnificationAssetWithRelatedPartyAndLitigationFinancePayableDetails">
        <link:definition>99940601 - Disclosure - Indemnification Asset with Related Party and Litigation Finance Payable (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureStockholdersEquityDetails" id="DisclosureStockholdersEquityDetails">
        <link:definition>99940801 - Disclosure - Stockholders' Equity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureStockBasedCompensationOtherDetails" id="DisclosureStockBasedCompensationOtherDetails">
        <link:definition>99940901 - Disclosure - Stock-Based Compensation - Other (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureStockBasedCompensationStockBasedCompensationExpenseDetails" id="DisclosureStockBasedCompensationStockBasedCompensationExpenseDetails">
        <link:definition>99940902 - Disclosure - Stock-Based Compensation - Stock-based Compensation Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureStockBasedCompensationUnamortizedCompensationExpenseDetails" id="DisclosureStockBasedCompensationUnamortizedCompensationExpenseDetails">
        <link:definition>99940903 - Disclosure - Stock-Based Compensation - Unamortized Compensation Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureStockBasedCompensationFairValueOfStockOptionsGrantedAndPurchaseRightsIssuedUnderEsppDetails" id="DisclosureStockBasedCompensationFairValueOfStockOptionsGrantedAndPurchaseRightsIssuedUnderEsppDetails">
        <link:definition>99940904 - Disclosure - Stock-Based Compensation - Fair Value of Stock Options Granted and Purchase Rights Issued under the ESPP (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureStockBasedCompensationStockOptionsDetails" id="DisclosureStockBasedCompensationStockOptionsDetails">
        <link:definition>99940905 - Disclosure - Stock-Based Compensation - Stock Options (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureStockBasedCompensationRestrictedAndPerformanceStockUnitsDetails" id="DisclosureStockBasedCompensationRestrictedAndPerformanceStockUnitsDetails">
        <link:definition>99940906 - Disclosure - Stock-Based Compensation - Restricted and Performance Stock Units (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureLeasesOtherDetails" id="DisclosureLeasesOtherDetails">
        <link:definition>99941001 - Disclosure - Leases - Other (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureLongTermDebtTermsDetails" id="DisclosureLongTermDebtTermsDetails">
        <link:definition>99941101 - Disclosure - Long-term Debt - Terms (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureLongTermDebtSummaryDetails" id="DisclosureLongTermDebtSummaryDetails">
        <link:definition>99941102 - Disclosure - Long-term Debt - Summary (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureIncomeTaxesDetails" id="DisclosureIncomeTaxesDetails">
        <link:definition>99941201 - Disclosure - Income Taxes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureCommitmentsAndContingenciesDetails" id="DisclosureCommitmentsAndContingenciesDetails">
        <link:definition>99941301 - Disclosure - Commitments and Contingencies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureLegalProceedingsDetails" id="DisclosureLegalProceedingsDetails">
        <link:definition>99941401 - Disclosure - Legal Proceedings (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureBusiness" id="DisclosureBusiness">
        <link:definition>995210101 - Disclosure - Business</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurements" id="DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurements">
        <link:definition>995210201 - Disclosure - Basis of Presentation, Significant Accounting Policies and Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureInventory" id="DisclosureInventory">
        <link:definition>995210301 - Disclosure - Inventory</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosurePropertyPlantAndEquipment" id="DisclosurePropertyPlantAndEquipment">
        <link:definition>995210401 - Disclosure - Property, Plant and Equipment</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureContractAcquisitionCostsAndIntangibleAsset" id="DisclosureContractAcquisitionCostsAndIntangibleAsset">
        <link:definition>995210501 - Disclosure - Contract Acquisition Costs and Intangible Asset</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureIndemnificationAssetWithRelatedPartyAndLitigationFinancePayable" id="DisclosureIndemnificationAssetWithRelatedPartyAndLitigationFinancePayable">
        <link:definition>995210601 - Disclosure - Indemnification Asset with Related Party and Litigation Finance Payable</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureAccruedExpensesAndOtherCurrentLiabilities" id="DisclosureAccruedExpensesAndOtherCurrentLiabilities">
        <link:definition>995210701 - Disclosure - Accrued Expenses and Other Current Liabilities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureStockholdersEquity" id="DisclosureStockholdersEquity">
        <link:definition>995210801 - Disclosure - Stockholders' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureStockBasedCompensation" id="DisclosureStockBasedCompensation">
        <link:definition>995210901 - Disclosure - Stock-Based Compensation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureLeases" id="DisclosureLeases">
        <link:definition>995211001 - Disclosure - Leases</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureLongTermDebt" id="DisclosureLongTermDebt">
        <link:definition>995211101 - Disclosure - Long-term Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureIncomeTaxes" id="DisclosureIncomeTaxes">
        <link:definition>995211201 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureCommitmentsAndContingencies" id="DisclosureCommitmentsAndContingencies">
        <link:definition>995211301 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureSegmentInformation" id="DisclosureSegmentInformation">
        <link:definition>995211501 - Disclosure - Segment Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurementsPolicies" id="DisclosureBasisOfPresentationSignificantAccountingPoliciesAndFairValueMeasurementsPolicies">
        <link:definition>99920202 - Disclosure - Basis of Presentation, Significant Accounting Policies and Fair Value Measurements (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureInventoryTables" id="DisclosureInventoryTables">
        <link:definition>99930303 - Disclosure - Inventory (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosurePropertyPlantAndEquipmentTables" id="DisclosurePropertyPlantAndEquipmentTables">
        <link:definition>99930403 - Disclosure - Property, Plant and Equipment (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureContractAcquisitionCostsAndIntangibleAssetTables" id="DisclosureContractAcquisitionCostsAndIntangibleAssetTables">
        <link:definition>99930503 - Disclosure - Contract Acquisition Costs and Intangible Asset (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesTables" id="DisclosureAccruedExpensesAndOtherCurrentLiabilitiesTables">
        <link:definition>99930703 - Disclosure - Accrued Expenses and Other Current Liabilities (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureStockholdersEquityTables" id="DisclosureStockholdersEquityTables">
        <link:definition>99930803 - Disclosure - Stockholders' Equity (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureLeasesTables" id="DisclosureLeasesTables">
        <link:definition>99931003 - Disclosure - Leases (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureLongTermDebtTables" id="DisclosureLongTermDebtTables">
        <link:definition>99931103 - Disclosure - Long-term Debt (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureSegmentInformationTables" id="DisclosureSegmentInformationTables">
        <link:definition>99931503 - Disclosure - Segment Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureContractAcquisitionCostsAndIntangibleAssetSummaryDetails" id="DisclosureContractAcquisitionCostsAndIntangibleAssetSummaryDetails">
        <link:definition>99940501 - Disclosure - Contract Acquisition Costs and Intangible Asset - Summary (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://liquidia.com/role/DisclosureLeasesRemainingLeaseTermAndDiscountRatesDetails" id="DisclosureLeasesRemainingLeaseTermAndDiscountRatesDetails">
        <link:definition>99941003 - Disclosure - Leases - Remaining Lease Term and Discount Rates (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="lqda-20260331_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="lqda-20260331_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="lqda-20260331_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="lqda-20260331_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple" />
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:import namespace="https://xbrl.org/2023/calculation-1.1" schemaLocation="https://www.xbrl.org/2023/calculation-1.1.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/ecd/2025" schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/ecd-sub/2025" schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-sub-2025.xsd" />
  <xsd:element name="HendersonSpvLlcMember" id="lqda_HendersonSpvLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element abstract="true" id="lqda_AgreementWithLGMPharmaLLCMember" name="AgreementWithLGMPharmaLLCMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lqda_BusinessCombinationContractAcquisitionCostsNet" name="BusinessCombinationContractAcquisitionCostsNet" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="lqda_ClassOfWarrantOrRightExercisedDuringPeriod" name="ClassOfWarrantOrRightExercisedDuringPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="lqda_IncreaseDecreaseInOperatingLeaseLiabilities" name="IncreaseDecreaseInOperatingLeaseLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lqda_LabAndBuildToSuitEquipmentMember" name="LabAndBuildToSuitEquipmentMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lqda_LeaseLiabilityMaturityTableTextBlock" name="LeaseLiabilityMaturityTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lqda_LiquidiaPAHAndSandozMember" name="LiquidiaPAHAndSandozMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lqda_NoncashPortionOfLeaseExpense" name="NoncashPortionOfLeaseExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="lqda_OperatingLeaseLiabilitiesCashPaid" name="OperatingLeaseLiabilitiesCashPaid" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lqda_PBMMember" name="PBMMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lqda_PatentMaintenancePolicyPolicyTextBlock" name="PatentMaintenancePolicyPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lqda_SandozMember" name="SandozMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lqda_StockIssuedDuringPeriodSharesCommonStockWarrantsExercised" name="StockIssuedDuringPeriodSharesCommonStockWarrantsExercised" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lqda_The2020PlanMember" name="The2020PlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lqda_UTCAndSmithsMedicalLitigationMember" name="UTCAndSmithsMedicalLitigationMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="lqda_WarrantsToPurchaseCommonStockMember" name="WarrantsToPurchaseCommonStockMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="lqda_BusinessAbstract" name="BusinessAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="lqda_OtherWarrantsMember" name="OtherWarrantsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="lqda_IncreaseInIndemnificationAssetThroughAccountsPayable" name="IncreaseInIndemnificationAssetThroughAccountsPayable" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="lqda_StockIssuedDuringPeriodSharesVestingOfRestrictedStockUnits" name="StockIssuedDuringPeriodSharesVestingOfRestrictedStockUnits" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="lqda_StockIssuedDuringPeriodValueVestingOfRestrictedStockUnits" name="StockIssuedDuringPeriodValueVestingOfRestrictedStockUnits" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="lqda_IndemnificationAssetRelatedParty" name="IndemnificationAssetRelatedParty" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="lqda_ContractAcquisitionCostsAndIntangibleAssetAbstract" name="ContractAcquisitionCostsAndIntangibleAssetAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="lqda_ContractAcquisitionCostsAndIntangibleAssetDisclosureTextBlock" name="ContractAcquisitionCostsAndIntangibleAssetDisclosureTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="lqda_IndemnificationAssetAndLitigationFinancePayableAbstract" name="IndemnificationAssetAndLitigationFinancePayableAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="lqda_IndemnificationAssetWithRelatedPartyAndLitigationFinancePayableDisclosureTextBlock" name="IndemnificationAssetWithRelatedPartyAndLitigationFinancePayableDisclosureTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="lqda_CustomerOneMember" name="CustomerOneMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="lqda_CustomerTwoMember" name="CustomerTwoMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="lqda_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <xsd:element name="InducementPlan2022Member" id="lqda_InducementPlan2022Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RelatedPartyTransactionMajorStockholderOwnershipPercentageInCompany" id="lqda_RelatedPartyTransactionMajorStockholderOwnershipPercentageInCompany" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="EmployeeStockPurchasePlan2020Member" id="lqda_EmployeeStockPurchasePlan2020Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EmployeePurchaseRightsMember" id="lqda_EmployeePurchaseRightsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AgreementExpirationTerm" id="lqda_AgreementExpirationTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="LeaseDisclosureTextBlock" id="lqda_LeaseDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AccruedExpensesAndOtherCurrentLiabilitiesTextBlock" id="lqda_AccruedExpensesAndOtherCurrentLiabilitiesTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AccruedExpensesAndOtherLiabilitiesCurrent" id="lqda_AccruedExpensesAndOtherLiabilitiesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ScheduleOfAccruedExpensesAndOtherCurrentLiabilitiesTableTextBlock" id="lqda_ScheduleOfAccruedExpensesAndOtherCurrentLiabilitiesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AccruedResearchAndDevelopmentExpenses" id="lqda_AccruedResearchAndDevelopmentExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LegalProceedingsDisclosureAbstract" id="lqda_LegalProceedingsDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ScheduleOfContractAcquisitionCostsAndIntangibleAssetsTableTextBlock" id="lqda_ScheduleOfContractAcquisitionCostsAndIntangibleAssetsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RevenueInterestFinancingAgreementMaximumInvestmentAmount" id="lqda_RevenueInterestFinancingAgreementMaximumInvestmentAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="HealthcareRoyaltyPartnersIvL.pAndHealthcareRoyaltyManagementLlcMember" id="lqda_HealthcareRoyaltyPartnersIvL.pAndHealthcareRoyaltyManagementLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RevenueInterestFinancingAgreementMember" id="lqda_RevenueInterestFinancingAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RevenueInterestFinancingAgreementHardCapPercentage" id="lqda_RevenueInterestFinancingAgreementHardCapPercentage" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RevenueInterestFinancingAgreementInternalRateOfReturn" id="lqda_RevenueInterestFinancingAgreementInternalRateOfReturn" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PercentageOfInvestmentAmountToBeRepaidOnFinalApproval" id="lqda_PercentageOfInvestmentAmountToBeRepaidOnFinalApproval" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PercentageOfInvestmentAmountToBePaid" id="lqda_PercentageOfInvestmentAmountToBePaid" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="MinimumCashAndCashEquivalentsRequiredToBeMaintainedDuringYearTwo" id="lqda_MinimumCashAndCashEquivalentsRequiredToBeMaintainedDuringYearTwo" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ScheduleOfActivityOfRevenueInterestFinancingAgreementTableTextBlock" id="lqda_ScheduleOfActivityOfRevenueInterestFinancingAgreementTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RevenueInterestFinancingAgreement" id="lqda_RevenueInterestFinancingAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevenueInterestFinancingPayableCurrent" id="lqda_RevenueInterestFinancingPayableCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevenueInterestFinancingPayableNoncurrent" id="lqda_RevenueInterestFinancingPayableNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevenueInterestFinancingAgreementEffectiveAnnualInterestRate" id="lqda_RevenueInterestFinancingAgreementEffectiveAnnualInterestRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardThresholdIncreaseInSharesAvailableForIssuanceAsPercentageOfStockIssuedAndOutstanding" id="lqda_ShareBasedCompensationArrangementByShareBasedPaymentAwardThresholdIncreaseInSharesAvailableForIssuanceAsPercentageOfStockIssuedAndOutstanding" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardThresholdIncreaseInSharesAvailableForIssuance" id="lqda_ShareBasedCompensationArrangementByShareBasedPaymentAwardThresholdIncreaseInSharesAvailableForIssuance" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseInSharesAvailableForIssuance" id="lqda_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseInSharesAvailableForIssuance" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PaymentsOnRevenueInterestFinancingLiability" id="lqda_PaymentsOnRevenueInterestFinancingLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PharmosaLicenseAgreementMember" id="lqda_PharmosaLicenseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MaximumPotentialDevelopmentMilestonePayments" id="lqda_MaximumPotentialDevelopmentMilestonePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="MaximumPotentialSalesMilestones" id="lqda_MaximumPotentialSalesMilestones" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="SecondAndThirdAmendmentsToRevenueInterestFinancingAgreementMember" id="lqda_SecondAndThirdAmendmentsToRevenueInterestFinancingAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AmendedAndRestatedCommercialManufacturingServicesAndSupplyAgreementWithLonzaTampaLlcMember" id="lqda_AmendedAndRestatedCommercialManufacturingServicesAndSupplyAgreementWithLonzaTampaLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TermOfSubmissionOfQuarterlyForecastOfExpectedProduction" id="lqda_TermOfSubmissionOfQuarterlyForecastOfExpectedProduction" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="InitialTermOfSubmissionOfQuarterlyForecastOfExpectedProductionBindingFirmOrder" id="lqda_InitialTermOfSubmissionOfQuarterlyForecastOfExpectedProductionBindingFirmOrder" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RevenueInterestFinancingAgreementAmountFunded" id="lqda_RevenueInterestFinancingAgreementAmountFunded" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AccruedResearchAndDevelopmentExpensePolicyTextBlock" id="lqda_AccruedResearchAndDevelopmentExpensePolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AccretionAndNonCashInterestExpense" id="lqda_AccretionAndNonCashInterestExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RevenueInterestFinancingAgreementAccretion" id="lqda_RevenueInterestFinancingAgreementAccretion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="FourthAmendmentToRevenueInterestFinancingAgreementMember" id="lqda_FourthAmendmentToRevenueInterestFinancingAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MichaelKasetaMember" id="lqda_MichaelKasetaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RajeevSaggarMember" id="lqda_RajeevSaggarMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RevenueInterestFinancingAgreementMinimumCashAndCashEquivalentToBeMaintained" id="lqda_RevenueInterestFinancingAgreementMinimumCashAndCashEquivalentToBeMaintained" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RevenueInterestFinancingPayablePolicyPolicyTextBlock" id="lqda_RevenueInterestFinancingPayablePolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="OperatingAndFinanceLeaseLiabilityCurrent" id="lqda_OperatingAndFinanceLeaseLiabilityCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="OperatingAndFinanceLeaseLiabilityNoncurrent" id="lqda_OperatingAndFinanceLeaseLiabilityNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AccruedInventoryCosts" id="lqda_AccruedInventoryCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="NonCancelableFutureCommitmentForProductManufacturingAndSupplyCosts" id="lqda_NonCancelableFutureCommitmentForProductManufacturingAndSupplyCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PerformanceBasedRestrictedStockUnitsMember" id="lqda_PerformanceBasedRestrictedStockUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RevenueInterestFinancingAgreementExpectedPaymentsRemainderOfFiscalYear" id="lqda_RevenueInterestFinancingAgreementExpectedPaymentsRemainderOfFiscalYear" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevenueInterestFinancingAgreementExpectedPaymentsYearOne" id="lqda_RevenueInterestFinancingAgreementExpectedPaymentsYearOne" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevenueInterestFinancingAgreementExpectedPaymentsYearTwo" id="lqda_RevenueInterestFinancingAgreementExpectedPaymentsYearTwo" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevenueInterestFinancingAgreementExpectedPaymentsYearThree" id="lqda_RevenueInterestFinancingAgreementExpectedPaymentsYearThree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevenueInterestFinancingAgreementExpectedPaymentsYearFour" id="lqda_RevenueInterestFinancingAgreementExpectedPaymentsYearFour" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RevenueInterestFinancingAgreementExpectedPaymentsTotal" id="lqda_RevenueInterestFinancingAgreementExpectedPaymentsTotal" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ScheduleOfExpectedAnnualPaymentsOnRevenueInterestFinancingAgreement" id="lqda_ScheduleOfExpectedAnnualPaymentsOnRevenueInterestFinancingAgreement" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="FifthAmendmentToRevenueInterestFinancingAgreementMember" id="lqda_FifthAmendmentToRevenueInterestFinancingAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BreachOfContractClaimMember" id="lqda_BreachOfContractClaimMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PaymentForUpfrontLicenseFee" id="lqda_PaymentForUpfrontLicenseFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="OtherThenNorthAmericaMember" id="lqda_OtherThenNorthAmericaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OnFirstFundedPortionOfInvestmentAmountMember" id="lqda_OnFirstFundedPortionOfInvestmentAmountMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OnSecondPortionOfFundedInvestmentAmountMember" id="lqda_OnSecondPortionOfFundedInvestmentAmountMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentAnnualIncreaseInCapitalShareReservedForFutureIssuance" id="lqda_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentAnnualIncreaseInCapitalShareReservedForFutureIssuance" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RevenueInterestFinancingAgreementExpectedPaymentsYearFiveAndThereafter" id="lqda_RevenueInterestFinancingAgreementExpectedPaymentsYearFiveAndThereafter" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="SingleReportableSegmentMember" id="lqda_SingleReportableSegmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="YutrepiaMember" id="lqda_YutrepiaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="L606Member" id="lqda_L606Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="GenericTreprostinilMember" id="lqda_GenericTreprostinilMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ProgramExpenses" id="lqda_ProgramExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NonProgramExpenses" id="lqda_NonProgramExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="SixthAmendmentToRevenueInterestFinancingAgreementMember" id="lqda_SixthAmendmentToRevenueInterestFinancingAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MilestonePaymentForEachAdditionalIndicationOne" id="lqda_MilestonePaymentForEachAdditionalIndicationOne" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="MilestonePaymentForEachAdditionalIndicationTwo" id="lqda_MilestonePaymentForEachAdditionalIndicationTwo" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="MilestonePaymentForEachAdditionalIndicationThree" id="lqda_MilestonePaymentForEachAdditionalIndicationThree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="OnThirdPortionOfFundedInvestmentAmountMember" id="lqda_OnThirdPortionOfFundedInvestmentAmountMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OnFourthPortionOfFundedInvestmentAmountMember" id="lqda_OnFourthPortionOfFundedInvestmentAmountMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RevenueInterestFinancingAgreementDiscount" id="lqda_RevenueInterestFinancingAgreementDiscount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PrelaunchInventoryPolicyTextBlock" id="lqda_PrelaunchInventoryPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RoyaltiesPolicyTextBlock" id="lqda_RoyaltiesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="InventoryCurrentAndNonCurrentNet" id="lqda_InventoryCurrentAndNonCurrentNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NumberOfMajorCustomers" id="lqda_NumberOfMajorCustomers" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PercentageOfPromptPaymentDiscounts" id="lqda_PercentageOfPromptPaymentDiscounts" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AccruedGrossToNetDeductions" id="lqda_AccruedGrossToNetDeductions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="NumberOfRenewalOptions" id="lqda_NumberOfRenewalOptions" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="LesseeOperatingLeaseRenewableStandByLetterOfCredit" id="lqda_LesseeOperatingLeaseRenewableStandByLetterOfCredit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LaboratoryOneAndOfficeSpaceMember" id="lqda_LaboratoryOneAndOfficeSpaceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="InventoryRawMaterialsNetOfReservesCurrentAndNoncurrent" id="lqda_InventoryRawMaterialsNetOfReservesCurrentAndNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="InventoryWorkInProcessNetOfReservesCurrentAndNoncurrent" id="lqda_InventoryWorkInProcessNetOfReservesCurrentAndNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="InventoryFinishedGoodsNetOfReservesCurrentAndNoncurrent" id="lqda_InventoryFinishedGoodsNetOfReservesCurrentAndNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="VecturaLicenseAgreementMember" id="lqda_VecturaLicenseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="UpfrontLicenseFee" id="lqda_UpfrontLicenseFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ScottMoomawMember" id="lqda_ScottMoomawMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RevenueInterestFinancingAgreementAmountAvailableForFunding" id="lqda_RevenueInterestFinancingAgreementAmountAvailableForFunding" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AcquiredInProcessResearchAndDevelopmentCostsPolicyTextBlock" id="lqda_AcquiredInProcessResearchAndDevelopmentCostsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RogerJeffsMember" id="lqda_RogerJeffsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TradingArrangementAdoptionMember" id="lqda_TradingArrangementAdoptionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TradingArrangementTerminationMember" id="lqda_TradingArrangementTerminationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AdditionalOfficeSpaceMember" id="lqda_AdditionalOfficeSpaceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ManufacturingAndOfficeSpaceMember" id="lqda_ManufacturingAndOfficeSpaceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ProceedsFromLitigationFinancing" id="lqda_ProceedsFromLitigationFinancing" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PercentageOfAdjustmentsToPriorPeriodSalesToRevenue" id="lqda_PercentageOfAdjustmentsToPriorPeriodSalesToRevenue" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="SarahKreppMember" id="lqda_SarahKreppMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
</xsd:schema>
