<?xml version="1.0" encoding="US-ASCII" ?>
    <!-- Field: Doc-Info; Name: Generator; Value: GoFiler Complete; Version: 4.26a -->
    <!-- Field: Doc-Info; Name: VendorURI; Value: http://www.novaworks.co -->
    <!-- Field: Doc-Info; Name: Source; Value: HROW%2D20181231 10K FY DFN.xfr; Date: 2019%2D03%2D12T18:49:23Z -->
    <!-- Field: Doc-Info; Name: Status; Value: 0x801A0000 -->
    <!-- Field: Doc-Info; Name: Misc; Value: 96Mps7xRiXgen8uDanwsWayDybP9z5Z8SekhvWBzbckKfy8pA4OmBSDPsGRGMQsD -->
<schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:dei="http://xbrl.sec.gov/dei/2018-01-31" xmlns:us-gaap="http://fasb.org/us-gaap/2018-01-31" xmlns:us-roles="http://fasb.org/us-roles/2018-01-31" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:us-types="http://fasb.org/us-types/2018-01-31" xmlns:HROW="http://imprimispharma.com/20181231" elementFormDefault="qualified" targetNamespace="http://imprimispharma.com/20181231">
    <annotation>
      <appinfo>
	<link:roleType roleURI="http://imprimispharma.com/role/DocumentAndEntityInformation" id="DocumentAndEntityInformation">
	  <link:definition>00000001 - 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://imprimispharma.com/role/BalanceSheets" id="BalanceSheets">
	  <link:definition>00000002 - Statement - 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://imprimispharma.com/role/BalanceSheetsParenthetical" id="BalanceSheetsParenthetical">
	  <link:definition>00000003 - Statement - Consolidated Balance Sheets (Parenthetical)</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://imprimispharma.com/role/StatementsOfOperations" id="StatementsOfOperations">
	  <link:definition>00000004 - Statement - Consolidated Statements of Operations</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://imprimispharma.com/role/StatementsOfStockholdersEquity" id="StatementsOfStockholdersEquity">
	  <link:definition>00000005 - Statement - 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://imprimispharma.com/role/StatementsOfCashFlows" id="StatementsOfCashFlows">
	  <link:definition>00000006 - Statement - 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://imprimispharma.com/role/Organization" id="Organization">
	  <link:definition>00000007 - Disclosure - Organization</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://imprimispharma.com/role/SummaryOfSignificantAccountingPolicies" id="SummaryOfSignificantAccountingPolicies">
	  <link:definition>00000008 - Disclosure - Summary of Significant Accounting 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://imprimispharma.com/role/Revenues" id="Revenues">
	  <link:definition>00000009 - Disclosure - Revenues</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://imprimispharma.com/role/InvestmentInEtonPharmaceuticalsInc.AndAgreements-RelatedPartyTransactions" id="InvestmentInEtonPharmaceuticalsInc.AndAgreements-RelatedPartyTransactions">
	  <link:definition>00000010 - Disclosure - Investment in Eton Pharmaceuticals, Inc. and Agreements - Related Party Transactions</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://imprimispharma.com/role/InvestmentInSurfacePharmaceuticalsInc.AndAgreements-RelatedPartyTransactions" id="InvestmentInSurfacePharmaceuticalsInc.AndAgreements-RelatedPartyTransactions">
	  <link:definition>00000011 - Disclosure - Investment in Surface Pharmaceuticals, Inc. and Agreements - Related Party Transactions</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://imprimispharma.com/role/RestrictedCash" id="RestrictedCash">
	  <link:definition>00000012 - Disclosure - Restricted Cash</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://imprimispharma.com/role/Inventories" id="Inventories">
	  <link:definition>00000013 - Disclosure - Inventories</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://imprimispharma.com/role/PrepaidExpensesAndOtherCurrentAssets" id="PrepaidExpensesAndOtherCurrentAssets">
	  <link:definition>00000014 - Disclosure - Prepaid Expenses and Other Current Assets</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://imprimispharma.com/role/AssetSalesAndNoteReceivable" id="AssetSalesAndNoteReceivable">
	  <link:definition>00000015 - Disclosure - Asset Sales and Note Receivable</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://imprimispharma.com/role/PropertyPlantAndEquipment" id="PropertyPlantAndEquipment">
	  <link:definition>00000016 - 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://imprimispharma.com/role/IntangibleAssetsAndGoodwill" id="IntangibleAssetsAndGoodwill">
	  <link:definition>00000017 - Disclosure - Intangible Assets and Goodwill</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://imprimispharma.com/role/AccountsPayableAndAccruedExpenses" id="AccountsPayableAndAccruedExpenses">
	  <link:definition>00000018 - Disclosure - Accounts Payable and Accrued Expenses</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://imprimispharma.com/role/Debt" id="Debt">
	  <link:definition>00000019 - Disclosure - 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://imprimispharma.com/role/CapitalLeaseObligation" id="CapitalLeaseObligation">
	  <link:definition>00000020 - Disclosure - Capital Lease Obligation</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://imprimispharma.com/role/StockholdersEquityAndStock-basedCompensation" id="StockholdersEquityAndStock-basedCompensation">
	  <link:definition>00000021 - Disclosure - Stockholders' Equity and 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://imprimispharma.com/role/IncomeTaxes" id="IncomeTaxes">
	  <link:definition>00000022 - 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://imprimispharma.com/role/EmployeeSavingsPlan" id="EmployeeSavingsPlan">
	  <link:definition>00000023 - Disclosure - Employee Savings Plan</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://imprimispharma.com/role/CommitmentsAndContingencies" id="CommitmentsAndContingencies">
	  <link:definition>00000024 - 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://imprimispharma.com/role/SegmentInformationAndConcentrations" id="SegmentInformationAndConcentrations">
	  <link:definition>00000025 - Disclosure - Segment Information and Concentrations</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://imprimispharma.com/role/SubsequentEvents" id="SubsequentEvents">
	  <link:definition>00000026 - Disclosure - Subsequent Events</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://imprimispharma.com/role/SummaryOfSignificantAccountingPoliciesPolicies" id="SummaryOfSignificantAccountingPoliciesPolicies">
	  <link:definition>00000027 - Disclosure - Summary of Significant Accounting Policies (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://imprimispharma.com/role/SummaryOfSignificantAccountingPoliciesTables" id="SummaryOfSignificantAccountingPoliciesTables">
	  <link:definition>00000028 - Disclosure - Summary of Significant Accounting Policies (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://imprimispharma.com/role/RevenuesTables" id="RevenuesTables">
	  <link:definition>00000029 - Disclosure - Revenues (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://imprimispharma.com/role/InvestmentInSurfacePharmaceuticalsInc.AndAgreements-RelatedPartyTransactionsTables" id="InvestmentInSurfacePharmaceuticalsInc.AndAgreements-RelatedPartyTransactionsTables">
	  <link:definition>00000030 - Disclosure - Investment in Surface Pharmaceuticals, Inc. and Agreements - Related Party Transactions (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://imprimispharma.com/role/InventoriesTables" id="InventoriesTables">
	  <link:definition>00000031 - Disclosure - Inventories (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://imprimispharma.com/role/PrepaidExpensesAndOtherCurrentAssetsTables" id="PrepaidExpensesAndOtherCurrentAssetsTables">
	  <link:definition>00000032 - Disclosure - Prepaid Expenses and Other Current Assets (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://imprimispharma.com/role/AssetSalesAndNoteReceivableTables" id="AssetSalesAndNoteReceivableTables">
	  <link:definition>00000033 - Disclosure - Asset Sales and Note Receivable (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://imprimispharma.com/role/PropertyPlantAndEquipmentTables" id="PropertyPlantAndEquipmentTables">
	  <link:definition>00000034 - 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://imprimispharma.com/role/IntangibleAssetsAndGoodwillTables" id="IntangibleAssetsAndGoodwillTables">
	  <link:definition>00000035 - Disclosure - Intangible Assets and Goodwill (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://imprimispharma.com/role/AccountsPayableAndAccruedExpensesTables" id="AccountsPayableAndAccruedExpensesTables">
	  <link:definition>00000036 - Disclosure - Accounts Payable and Accrued Expenses (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://imprimispharma.com/role/DebtTables" id="DebtTables">
	  <link:definition>00000037 - Disclosure - 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://imprimispharma.com/role/CapitalLeaseObligationTables" id="CapitalLeaseObligationTables">
	  <link:definition>00000038 - Disclosure - Capital Lease Obligation (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://imprimispharma.com/role/StockholdersEquityAndStock-basedCompensationTables" id="StockholdersEquityAndStock-basedCompensationTables">
	  <link:definition>00000039 - Disclosure - Stockholders' Equity and 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://imprimispharma.com/role/IncomeTaxesTables" id="IncomeTaxesTables">
	  <link:definition>00000040 - Disclosure - Income Taxes (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://imprimispharma.com/role/CommitmentsAndContingenciesTables" id="CommitmentsAndContingenciesTables">
	  <link:definition>00000041 - Disclosure - Commitments and Contingencies (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://imprimispharma.com/role/SubsequentEventsTables" id="SubsequentEventsTables">
	  <link:definition>00000042 - Disclosure - Subsequent Events (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://imprimispharma.com/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative" id="SummaryOfSignificantAccountingPoliciesDetailsNarrative">
	  <link:definition>00000043 - Disclosure - Summary of Significant Accounting Policies (Details Narrative)</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://imprimispharma.com/role/SummaryOfSignificantAccountingPolicies-ScheduleOfBasicEarningsPerCommonShareDetails" id="SummaryOfSignificantAccountingPolicies-ScheduleOfBasicEarningsPerCommonShareDetails">
	  <link:definition>00000044 - Disclosure - Summary of Significant Accounting Policies - Schedule of Basic Earnings Per Common 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://imprimispharma.com/role/SummaryOfSignificantAccountingPolicies-ScheduleOfDilutedCommonEquivalentSharesDetails" id="SummaryOfSignificantAccountingPolicies-ScheduleOfDilutedCommonEquivalentSharesDetails">
	  <link:definition>00000045 - Disclosure - Summary of Significant Accounting Policies - Schedule of Diluted Common Equivalent Shares (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://imprimispharma.com/role/SummaryOfSignificantAccountingPolicies-ScheduleOfDilutedEarningsPerCommonShareDetails" id="SummaryOfSignificantAccountingPolicies-ScheduleOfDilutedEarningsPerCommonShareDetails">
	  <link:definition>00000046 - Disclosure - Summary of Significant Accounting Policies - Schedule of Diluted Earnings Per Common 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://imprimispharma.com/role/RevenuesDetailsNarrative" id="RevenuesDetailsNarrative">
	  <link:definition>00000047 - Disclosure - Revenues (Details Narrative)</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://imprimispharma.com/role/Revenue-ScheduleOfDisaggregatedRevenueDetails" id="Revenue-ScheduleOfDisaggregatedRevenueDetails">
	  <link:definition>00000048 - Disclosure - Revenue - Schedule of Disaggregated Revenue (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://imprimispharma.com/role/InvestmentInEtonPharmaceuticalsInc.AndAgreements-RelatedPartyTransactionsDetailsNarrative" id="InvestmentInEtonPharmaceuticalsInc.AndAgreements-RelatedPartyTransactionsDetailsNarrative">
	  <link:definition>00000049 - Disclosure - Investment in Eton Pharmaceuticals, Inc. and Agreements - Related Party Transactions (Details Narrative)</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://imprimispharma.com/role/InvestmentInSurfacePharmaceuticalsInc.AndAgreements-RelatedPartyTransactionsDetailsNarrative" id="InvestmentInSurfacePharmaceuticalsInc.AndAgreements-RelatedPartyTransactionsDetailsNarrative">
	  <link:definition>00000050 - Disclosure - Investment in Surface Pharmaceuticals, Inc. and Agreements - Related Party Transactions (Details Narrative)</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://imprimispharma.com/role/InvestmentInSurfacePharmaceuticalsInc.AndAgreements-RelatedPartyTransactions-ScheduleOfCondensedIncomeStatementDetails" id="InvestmentInSurfacePharmaceuticalsInc.AndAgreements-RelatedPartyTransactions-ScheduleOfCondensedIncomeStatementDetails">
	  <link:definition>00000051 - Disclosure - Investment in Surface Pharmaceuticals, Inc. and Agreements - Related Party Transactions - Schedule of Condensed Income Statement (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://imprimispharma.com/role/InvestmentInSurfacePharmaceuticalsInc.AndAgreements-RelatedPartyTransactions-ScheduleOfCondensedBalanceSheetDetails" id="InvestmentInSurfacePharmaceuticalsInc.AndAgreements-RelatedPartyTransactions-ScheduleOfCondensedBalanceSheetDetails">
	  <link:definition>00000052 - Disclosure - Investment in Surface Pharmaceuticals, Inc. and Agreements - Related Party Transactions - Schedule of Condensed Balance Sheet (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://imprimispharma.com/role/RestrictedCashDetailsNarrative" id="RestrictedCashDetailsNarrative">
	  <link:definition>00000053 - Disclosure - Restricted Cash (Details Narrative)</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://imprimispharma.com/role/Inventories-ScheduleOfInventoriesDetails" id="Inventories-ScheduleOfInventoriesDetails">
	  <link:definition>00000054 - Disclosure - Inventories - Schedule of Inventories (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://imprimispharma.com/role/PrepaidExpensesAndOtherCurrentAssets-ScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails" id="PrepaidExpensesAndOtherCurrentAssets-ScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails">
	  <link:definition>00000055 - Disclosure - Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (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://imprimispharma.com/role/AssetSalesAndNoteReceivableDetailsNarrative" id="AssetSalesAndNoteReceivableDetailsNarrative">
	  <link:definition>00000056 - Disclosure - Asset Sales and Note Receivable (Details Narrative)</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://imprimispharma.com/role/AssetSalesAndNoteReceivable-ScheduleOfAssetsSalesAndNoteReceivableDetails" id="AssetSalesAndNoteReceivable-ScheduleOfAssetsSalesAndNoteReceivableDetails">
	  <link:definition>00000057 - Disclosure - Asset Sales and Note Receivable - Schedule of Assets Sales and Note Receivable (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://imprimispharma.com/role/PropertyPlantAndEquipmentDetailsNarrative" id="PropertyPlantAndEquipmentDetailsNarrative">
	  <link:definition>00000058 - Disclosure - Property, Plant and Equipment (Details Narrative)</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://imprimispharma.com/role/PropertyPlantAndEquipment-ScheduleOfPropertyPlantAndEquipmentDetails" id="PropertyPlantAndEquipment-ScheduleOfPropertyPlantAndEquipmentDetails">
	  <link:definition>00000059 - 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://imprimispharma.com/role/IntangibleAssetsAndGoodwill-ScheduleOfIntangibleAssetsDetails" id="IntangibleAssetsAndGoodwill-ScheduleOfIntangibleAssetsDetails">
	  <link:definition>00000060 - Disclosure - Intangible Assets and Goodwill - Schedule of Intangible Assets (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://imprimispharma.com/role/IntangibleAssetsAndGoodwill-ScheduleOfAmortizationExpensesForIntangibleAssetsDetails" id="IntangibleAssetsAndGoodwill-ScheduleOfAmortizationExpensesForIntangibleAssetsDetails">
	  <link:definition>00000061 - Disclosure - Intangible Assets and Goodwill - Schedule of Amortization Expenses for Intangible Assets (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://imprimispharma.com/role/IntangibleAssetsAndGoodwill-ScheduleOfEstimatedFutureAmortizationExpenseDetails" id="IntangibleAssetsAndGoodwill-ScheduleOfEstimatedFutureAmortizationExpenseDetails">
	  <link:definition>00000062 - Disclosure - Intangible Assets and Goodwill - Schedule of Estimated Future Amortization 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://imprimispharma.com/role/AccountsPayableAndAccruedExpenses-ScheduleOfAccountsPayableAndAccruedExpensesDetails" id="AccountsPayableAndAccruedExpenses-ScheduleOfAccountsPayableAndAccruedExpensesDetails">
	  <link:definition>00000063 - Disclosure - Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (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://imprimispharma.com/role/DebtDetailsNarrative" id="DebtDetailsNarrative">
	  <link:definition>00000064 - Disclosure - Debt (Details Narrative)</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://imprimispharma.com/role/Debt-SummaryOfNotesPayableDetails" id="Debt-SummaryOfNotesPayableDetails">
	  <link:definition>00000065 - Disclosure - Debt - Summary of Notes 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://imprimispharma.com/role/Debt-SummaryOfFutureMinimumPaymentsDetails" id="Debt-SummaryOfFutureMinimumPaymentsDetails">
	  <link:definition>00000066 - Disclosure - Debt - Summary of Future Minimum 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://imprimispharma.com/role/CapitalLeaseObligationDetailsNarrative" id="CapitalLeaseObligationDetailsNarrative">
	  <link:definition>00000067 - Disclosure - Capital Lease Obligation (Details Narrative)</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://imprimispharma.com/role/CapitalLeaseObligation-ScheduleOfFuturePaymentUnderCapitalLeaseDetails" id="CapitalLeaseObligation-ScheduleOfFuturePaymentUnderCapitalLeaseDetails">
	  <link:definition>00000068 - Disclosure - Capital Lease Obligation - Schedule of Future Payment Under Capital Lease (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://imprimispharma.com/role/StockholdersEquityAndStock-basedCompensationDetailsNarrative" id="StockholdersEquityAndStock-basedCompensationDetailsNarrative">
	  <link:definition>00000069 - Disclosure - Stockholders' Equity and Stock-based Compensation (Details Narrative)</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://imprimispharma.com/role/StockholdersEquityAndStock-basedCompensation-ScheduleOfStockOptionPlanActivityDetails" id="StockholdersEquityAndStock-basedCompensation-ScheduleOfStockOptionPlanActivityDetails">
	  <link:definition>00000070 - Disclosure - Stockholders' Equity and Stock-based Compensation - Schedule of Stock Option Plan Activity (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://imprimispharma.com/role/StockholdersEquityAndStock-basedCompensation-ScheduleOfFairValueAssumptionsDetails" id="StockholdersEquityAndStock-basedCompensation-ScheduleOfFairValueAssumptionsDetails">
	  <link:definition>00000071 - Disclosure - Stockholders' Equity and Stock-based Compensation - Schedule of Fair Value Assumptions (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://imprimispharma.com/role/StockholdersEquityAndStock-basedCompensation-ScheduleOfSharesOutstandingAndExercisableDetails" id="StockholdersEquityAndStock-basedCompensation-ScheduleOfSharesOutstandingAndExercisableDetails">
	  <link:definition>00000072 - Disclosure - Stockholders' Equity and Stock-based Compensation - Schedule of Shares Outstanding and Exercisable (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://imprimispharma.com/role/StockholdersEquityAndStock-basedCompensation-ScheduleOfRestrictedStockUnitsActivityDetails" id="StockholdersEquityAndStock-basedCompensation-ScheduleOfRestrictedStockUnitsActivityDetails">
	  <link:definition>00000073 - Disclosure - Stockholders' Equity and Stock-based Compensation - Schedule of Restricted Stock Units Activity (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://imprimispharma.com/role/StockholdersEquityAndStock-basedCompensation-ScheduleOfStockBasedCompensationGrantedToEmployeesDirectorsConsultantsDetails" id="StockholdersEquityAndStock-basedCompensation-ScheduleOfStockBasedCompensationGrantedToEmployeesDirectorsConsultantsDetails">
	  <link:definition>00000074 - Disclosure - Stockholders' Equity and Stock-based Compensation - Schedule of Stock Based Compensation Granted to Employees Directors Consultants (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://imprimispharma.com/role/StockholdersEquityAndStock-basedCompensation-ScheduleOfWarrantsActivityDetails" id="StockholdersEquityAndStock-basedCompensation-ScheduleOfWarrantsActivityDetails">
	  <link:definition>00000075 - Disclosure - Stockholders' Equity and Stock-based Compensation - Schedule of Warrants Activity (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://imprimispharma.com/role/StockholdersEquityAndStock-basedCompensation-ScheduleOfWarrantsOutstandingAndWarrantsExercisableDetails" id="StockholdersEquityAndStock-basedCompensation-ScheduleOfWarrantsOutstandingAndWarrantsExercisableDetails">
	  <link:definition>00000076 - Disclosure - Stockholders' Equity and Stock-based Compensation - Schedule of Warrants Outstanding and Warrants Exercisable (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://imprimispharma.com/role/IncomeTaxesDetailsNarrative" id="IncomeTaxesDetailsNarrative">
	  <link:definition>00000077 - Disclosure - Income Taxes (Details Narrative)</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://imprimispharma.com/role/IncomeTaxes-ScheduleOfProvisionForIncomeTaxesDetails" id="IncomeTaxes-ScheduleOfProvisionForIncomeTaxesDetails">
	  <link:definition>00000078 - Disclosure - Income Taxes - Schedule of Provision for 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://imprimispharma.com/role/IncomeTaxes-ScheduleOfIncomeTaxReconciliationDetails" id="IncomeTaxes-ScheduleOfIncomeTaxReconciliationDetails">
	  <link:definition>00000079 - Disclosure - Income Taxes - Schedule of Income Tax Reconciliation (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://imprimispharma.com/role/IncomeTaxes-ScheduleOfDeferredTaxAssetsAndLiabilitiesDetails" id="IncomeTaxes-ScheduleOfDeferredTaxAssetsAndLiabilitiesDetails">
	  <link:definition>00000080 - Disclosure - Income Taxes - Schedule of Deferred Tax Assets and 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://imprimispharma.com/role/IncomeTaxes-ScheduleOfChangeInUnrecognizedTaxBenefitsDetails" id="IncomeTaxes-ScheduleOfChangeInUnrecognizedTaxBenefitsDetails">
	  <link:definition>00000081 - Disclosure - Income Taxes - Schedule of Change in Unrecognized Tax Benefits (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://imprimispharma.com/role/EmployeeSavingsPlanDetailsNarrative" id="EmployeeSavingsPlanDetailsNarrative">
	  <link:definition>00000082 - Disclosure - Employee Savings Plan (Details Narrative)</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://imprimispharma.com/role/CommitmentsAndContingenciesDetailsNarrative" id="CommitmentsAndContingenciesDetailsNarrative">
	  <link:definition>00000083 - Disclosure - Commitments and Contingencies (Details Narrative)</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://imprimispharma.com/role/CommitmentsAndContingencies-ScheduleOfFuturePaymentsUnderLeasesDetails" id="CommitmentsAndContingencies-ScheduleOfFuturePaymentsUnderLeasesDetails">
	  <link:definition>00000084 - Disclosure - Commitments and Contingencies - Schedule of Future Payments Under Leases (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://imprimispharma.com/role/SegmentInformationAndConcentrationsDetailsNarrative" id="SegmentInformationAndConcentrationsDetailsNarrative">
	  <link:definition>00000085 - Disclosure - Segment Information and Concentrations (Details Narrative)</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://imprimispharma.com/role/SubsequentEventsDetailsNarrative" id="SubsequentEventsDetailsNarrative">
	  <link:definition>00000086 - Disclosure - Subsequent Events (Details Narrative)</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://imprimispharma.com/role/SubsequentEvents-ScheduleOfOperatingSegmentDetails" id="SubsequentEvents-ScheduleOfOperatingSegmentDetails">
	  <link:definition>00000087 - Disclosure - Subsequent Events - Schedule of Operating Segment (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:type="simple" xlink:href="hrow-20181231_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Presentation Links" />
	<link:linkbaseRef xlink:type="simple" xlink:href="hrow-20181231_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Label Links" />
	<link:linkbaseRef xlink:type="simple" xlink:href="hrow-20181231_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Calculation Links" />
	<link:linkbaseRef xlink:type="simple" xlink:href="hrow-20181231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Definition Links" />
      </appinfo>
    </annotation>
    <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
    <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
    <import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
    <import namespace="http://xbrl.sec.gov/dei/2018-01-31" schemaLocation="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd" />
    <import namespace="http://fasb.org/us-gaap/2018-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd" />
    <import namespace="http://fasb.org/us-types/2018-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2018/elts/us-types-2018-01-31.xsd" />
    <import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
    <import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
    <import namespace="http://xbrl.sec.gov/country/2017-01-31" schemaLocation="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd" />
    <import namespace="http://fasb.org/srt/2018-01-31" schemaLocation="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd" />
    <element id="HROW_FiniteLivedIntangibleAssetsImpairment" name="FiniteLivedIntangibleAssetsImpairment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionsExercisableWeightedAverageRemainingContractualTerm1" name="SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionsExercisableWeightedAverageRemainingContractualTerm1" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice1" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionsOutstandingWeightedAverageExercisePrice1" nillable="true" xbrli:periodType="instant" type="num:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExpirationsInPeriodWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExpirationsInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" type="num:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_WarrantsIssuanceDate" name="WarrantsIssuanceDate" nillable="true" xbrli:periodType="duration" type="xbrli:dateItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions1" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions1" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_WarrantsExpirationDate" name="WarrantsExpirationDate" nillable="true" xbrli:periodType="duration" type="xbrli:dateItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_RoyaltyPaymentDescription" name="RoyaltyPaymentDescription" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_CashCashEquivalentsAndRestrictedCashAtEndOfPeriod" name="CashCashEquivalentsAndRestrictedCashAtEndOfPeriod" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ReconciliationRestrictedCash" name="ReconciliationRestrictedCash" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ReconciliationOfCashAndCashEquivalents" name="ReconciliationOfCashAndCashEquivalents" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_PaymentsOfLicense" name="PaymentsOfLicense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_InvestmentsAndAgreementsRelatedPartyTransactionsTextBlock" name="InvestmentsAndAgreementsRelatedPartyTransactionsTextBlock" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LiquidityDisclosurePolicyTextBlock" name="LiquidityDisclosurePolicyTextBlock" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_RecentlyAdoptedAccountingPronouncementsPolicyTextBlock" name="RecentlyAdoptedAccountingPronouncementsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ScheduleOfPrepaidExpensesAndOtherCurrentAssetsTableTextBlock" name="ScheduleOfPrepaidExpensesAndOtherCurrentAssetsTableTextBlock" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ScheduleofWarrantsOutstandingAndExercisableTableTextBlock" name="ScheduleofWarrantsOutstandingAndExercisableTableTextBlock" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_DeferredAcquisitionObligationAndAccruedInterestCurrent" name="DeferredAcquisitionObligationAndAccruedInterestCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_FinalFeeOnNotePayableRecordedAsDebtDiscountAndIncludedInAccruedExpenses" name="FinalFeeOnNotePayableRecordedAsDebtDiscountAndIncludedInAccruedExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_EstimatedRelativeFairValueOfWarrantsIssuedInConnectionWithNotePayable" name="EstimatedRelativeFairValueOfWarrantsIssuedInConnectionWithNotePayable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_NoteReceivableInConnectionWithSaleOfAssets" name="NoteReceivableInConnectionWithSaleOfAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageExercisePrice" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionsExercisedInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" type="num:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_NumberOfWarrantsExercised" name="NumberOfWarrantsExercised" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ClosingPriceOfCommonStockPricePerShare" name="ClosingPriceOfCommonStockPricePerShare" nillable="true" xbrli:periodType="instant" type="num:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ForfeitureFactorPercentage" name="ForfeitureFactorPercentage" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_CashCommissionPercentage" name="CashCommissionPercentage" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_StockIssuedDuringPeriodSharesForExerciseOfWarrants" name="StockIssuedDuringPeriodSharesForExerciseOfWarrants" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_StockIssuedDuringPeriodForExerciseOfWarrants" name="StockIssuedDuringPeriodForExerciseOfWarrants" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_VestingOfRestrictedStockUnitNetOfTaxWithholdingShares" name="VestingOfRestrictedStockUnitNetOfTaxWithholdingShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_VestingOfRestrictedStockUnitNetOfTaxWithholding" name="VestingOfRestrictedStockUnitNetOfTaxWithholding" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_AssetSalesAndNoteReceivableTextBlock" name="AssetSalesAndNoteReceivableTextBlock" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ThirdPartyBillingAndCollectionAgreementsPolicyTextBlock" name="ThirdPartyBillingAndCollectionAgreementsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_PercentageOfBillingAndCollectionAmount" name="PercentageOfBillingAndCollectionAmount" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_BillingAndCollectionManagementExpense" name="BillingAndCollectionManagementExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_RoyaltyPaymentPercentageOnNetSales" name="RoyaltyPaymentPercentageOnNetSales" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_RoyaltyPaymentPercentageOnNetSalesPatentClaimsNotIssued" name="RoyaltyPaymentPercentageOnNetSalesPatentClaimsNotIssued" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_PaymentOnIssuancesOfPatent" name="PaymentOnIssuancesOfPatent" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_PaymentToClosingCashAmount" name="PaymentToClosingCashAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_AssetsOfDisposalGroupIncludingDiscontinuedOperationLossOnAssetSale" name="AssetsOfDisposalGroupIncludingDiscontinuedOperationLossOnAssetSale" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_PercentageOfLoanAgreementFinalFee" name="PercentageOfLoanAgreementFinalFee" nillable="true" xbrli:periodType="instant" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_PercentageOfLoanAgreementPrepaymentFee" name="PercentageOfLoanAgreementPrepaymentFee" nillable="true" xbrli:periodType="instant" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_WarrantTerm" name="WarrantTerm" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_FairValueAssumptionsMeasurementInputTerm" name="FairValueAssumptionsMeasurementInputTerm" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_FairValueAssumptionsMeasurementInputPercentages" name="FairValueAssumptionsMeasurementInputPercentages" nillable="true" xbrli:periodType="instant" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LeaseMonthlyPayments" name="LeaseMonthlyPayments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LeaseFuturePayment" name="LeaseFuturePayment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_CostOfSalePolicyTextBlock" name="CostOfSalePolicyTextBlock" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_DeferredIncomeChangeInValuationAllowance" name="DeferredIncomeChangeInValuationAllowance" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_EffecticveIncomeTaxRateBenefitOfLowerTaxBrackets" name="EffecticveIncomeTaxRateBenefitOfLowerTaxBrackets" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_EffectiveIncomeTaxRateLossOnDebtConversion" name="EffectiveIncomeTaxRateLossOnDebtConversion" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_DeferredTaxAssetTAxCreditXarryForwardsDepreciationAndAmortization" name="DeferredTaxAssetTAxCreditXarryForwardsDepreciationAndAmortization" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_IncomeTaxBasisDifferenceInRelatedParty" name="IncomeTaxBasisDifferenceInRelatedParty" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_IncomeTaxBasisDifferenceInRelatedPartyOne" name="IncomeTaxBasisDifferenceInRelatedPartyOne" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_PercentageOfSalaryDepositsInTaxDeferredInvestmentAccount" name="PercentageOfSalaryDepositsInTaxDeferredInvestmentAccount" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_CommissionPaymentsPercentage" name="CommissionPaymentsPercentage" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_IncurredRoyaltyExpenses" name="IncurredRoyaltyExpenses" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_PercentageOfDrugAndChemicalPurchases" name="PercentageOfDrugAndChemicalPurchases" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_RoyaltyPercentage" name="RoyaltyPercentage" nillable="true" xbrli:periodType="instant" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_GrossProceedsFromRoyalty" name="GrossProceedsFromRoyalty" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SegmentContribution" name="SegmentContribution" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_NetProceedsOfRegisteredOffering" name="NetProceedsOfRegisteredOffering" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_GrossProceedsPercentage" name="GrossProceedsPercentage" nillable="true" xbrli:periodType="duration" type="num:percentItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_NumberOfCommonStockIssuedForWarrantExercises" name="NumberOfCommonStockIssuedForWarrantExercises" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SalesCommissionAndOfferingExpenses" name="SalesCommissionAndOfferingExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_Investment1PolicyTextBlock" name="Investment1PolicyTextBlock" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ScheduleOfAssetsSalesAndNoteReceivableTableTextBlock" name="ScheduleOfAssetsSalesAndNoteReceivableTableTextBlock" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_IncrementalCommonSharesAttributableDilutiveCommonEquivalents" name="IncrementalCommonSharesAttributableDilutiveCommonEquivalents" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_AmountPaidForServices" name="AmountPaidForServices" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_FederalResearchAndDevelopmentTaxCreditsExpirationDate" name="FederalResearchAndDevelopmentTaxCreditsExpirationDate" nillable="true" xbrli:periodType="duration" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_FederalResearchAndDevelopmentTaxCredits" name="FederalResearchAndDevelopmentTaxCredits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_StateNetOperatingLossExpirationDate" name="StateNetOperatingLossExpirationDate" nillable="true" xbrli:periodType="duration" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_StateResearchAndDevelopmentTaxCredits" name="StateResearchAndDevelopmentTaxCredits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_Corporate" name="Corporate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_FairValueAssumptionsMeasurementInputPerShare" name="FairValueAssumptionsMeasurementInputPerShare" nillable="true" xbrli:periodType="instant" type="num:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_StockOptionPlanMember" name="StockOptionPlanMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_TwoThousandAndSevenIncentiveStockandAwardsPlanMember" name="TwoThousandAndSevenIncentiveStockandAwardsPlanMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_InitialPaymentMember" name="InitialPaymentMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_KlarityLicenseAgreementMember" name="KlarityLicenseAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_RichardLLindstromMDMember" name="RichardLLindstromMDMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SecondPaymentMember" name="SecondPaymentMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_FinalPaymentMember" name="FinalPaymentMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SalesAgreementMember" name="SalesAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_CantorFitzgeraldCoMember" name="CantorFitzgeraldCoMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LicensesMember" name="LicensesMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SalesAndMarketingAgreementsMember" name="SalesAndMarketingAgreementsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ProductSalesNetMember" name="ProductSalesNetMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LicenseRevenuesMember" name="LicenseRevenuesMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_EtonPharmaceuticalsIncMember" name="EtonPharmaceuticalsIncMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_StatePharmacyLicensesMember" name="StatePharmacyLicensesMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_AndrewRBollMember" name="AndrewRBollMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_JohnPSaharekMember" name="JohnPSaharekMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_UnvestedRSUMember" name="UnvestedRSUMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ConsultantsEmployeesAndDirectorsMember" name="ConsultantsEmployeesAndDirectorsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_OptionsEmployeesMember" name="OptionsEmployeesMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_RangeOneMember" name="RangeOneMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_RangeTwoMember" name="RangeTwoMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_RangeThreeMember" name="RangeThreeMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_RangeFourMember" name="RangeFourMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_RangeFiveMember" name="RangeFiveMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LenderWarrantsMember" name="LenderWarrantsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SettlementWarrantsMember" name="SettlementWarrantsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_WarrantsIssuedToInvestorRelationsConsultantOneMember" name="WarrantsIssuedToInvestorRelationsConsultantOneMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_PlacementAgentWarrantsMember" name="PlacementAgentWarrantsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_PIPEInvestorandPlacementAgentWarrantsMember" name="PIPEInvestorandPlacementAgentWarrantsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LenderWarrantsOneMember" name="LenderWarrantsOneMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_EmployeesMember" name="EmployeesMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SellingGeneralAndAdministrativeMember" name="SellingGeneralAndAdministrativeMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ConsultantMember" name="ConsultantMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SurfacePharmaceuticalsMember" name="SurfacePharmaceuticalsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_EtonPharmaceuticalsMember" name="EtonPharmaceuticalsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_NonEmployeeDirectorsMember" name="NonEmployeeDirectorsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_NotePayableMember" name="NotePayableMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_EmployeesAndConsultantsMember" name="EmployeesAndConsultantsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_DeferredAcquisitionObligationsConvertibleNotePayableStockOptionsUnvestedRSUsAndWarrantsMember" name="DeferredAcquisitionObligationsConvertibleNotePayableStockOptionsUnvestedRSUsAndWarrantsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SurfaceSeriesAStockMember" name="SurfaceSeriesAStockMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SurfacePharmaceuticalsIncMember" name="SurfacePharmaceuticalsIncMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_StockOptionsMember" name="StockOptionsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SurfaceLicenseAgreementsMember" name="SurfaceLicenseAgreementsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_MSAMember" name="MSAMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_DrLindstromMember" name="DrLindstromMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_CommonStockWarrantsMember" name="CommonStockWarrantsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_CommonStockWarrantOneMember" name="CommonStockWarrantOneMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_TwoThousandAndSeventeenIncentiveStockandAwardsPlanMember" name="TwoThousandAndSeventeenIncentiveStockandAwardsPlanMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_EtonPharmaceuticalsIncOneMember" name="EtonPharmaceuticalsIncOneMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_EtonPharmaceuticalsIncTwoMember" name="EtonPharmaceuticalsIncTwoMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SurfacePharmaceuticalsIncOneMember" name="SurfacePharmaceuticalsIncOneMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SurfacePharmaceuticalsIncTwoMember" name="SurfacePharmaceuticalsIncTwoMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_BillingAndCollectionAgreementMember" name="BillingAndCollectionAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ThirdPartyMember" name="ThirdPartyMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_EtonLicenseAgreementsMember" name="EtonLicenseAgreementsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ManagementServicesAgreementMember" name="ManagementServicesAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_AssetPurchaseAgreementMember" name="AssetPurchaseAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_PharmacySolutionsCentralLLCMember" name="PharmacySolutionsCentralLLCMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_DecemberThirtyOneTwoThousandSeventeenMember" name="DecemberThirtyOneTwoThousandSeventeenMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_StockPurchaseAgreementMember" name="StockPurchaseAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LivernoisMember" name="LivernoisMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ImprimistxMember" name="ImprimistxMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LoanAndSecurityAgreementMember" name="LoanAndSecurityAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LifeSciencesAlternativeFundingLLCMember" name="LifeSciencesAlternativeFundingLLCMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LoanAgreementMember" name="LoanAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_NotePurchaseAgreementMember" name="NotePurchaseAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_EightPercentageConvertibleSeniorSecuredNoteMember" name="EightPercentageConvertibleSeniorSecuredNoteMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ConvertibleNoteMember" name="ConvertibleNoteMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ExchangeAgreementMember" name="ExchangeAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SWKLoanAgreementMember" name="SWKLoanAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LSAFLoanMember" name="LSAFLoanMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LondonInterBankOfferedRateMember" name="LondonInterBankOfferedRateMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SWKWarrantsMember" name="SWKWarrantsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_NotesPayableMember" name="NotesPayableMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LeaseAgreementMember" name="LeaseAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_AmendedLeaseAgreementMember" name="AmendedLeaseAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_CommercialLeaseAgreementMember" name="CommercialLeaseAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_FebruaryTwoThousandNineteenMember" name="FebruaryTwoThousandNineteenMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_LicenseAgreementMember" name="LicenseAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SettlementAgreementMember" name="SettlementAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_CashlessWarrantsExerciseMember" name="CashlessWarrantsExerciseMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_MayAssetPurchaseAgreementMember" name="MayAssetPurchaseAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_EllePharmaceuticalLLCMember" name="EllePharmaceuticalLLCMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ElleRoyaltyAgreementMember" name="ElleRoyaltyAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_MayfieldPharmaceuticalLLCMember" name="MayfieldPharmaceuticalLLCMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_MayAssetPurchaseAndElleRoyaltyAgreementMember" name="MayAssetPurchaseAndElleRoyaltyAgreementMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_PharmaceuticalCompoundingMember" name="PharmaceuticalCompoundingMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_PharmaceuticalDrugDevelopmentMember" name="PharmaceuticalDrugDevelopmentMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SecuritiesPurchaseAgreementsMember" name="SecuritiesPurchaseAgreementsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_TwoAccreditedInvestorsMember" name="TwoAccreditedInvestorsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_RangeSixMember" name="RangeSixMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_SellingAndMarketingMember" name="SellingAndMarketingMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_GeneralAndAdministrativeMember" name="GeneralAndAdministrativeMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_OtherMember" name="OtherMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_AmendedAndRestatedCertificateOfIncorporationMember" name="AmendedAndRestatedCertificateOfIncorporationMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_PreviouslyAuthorizedSharesMember" name="PreviouslyAuthorizedSharesMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_StockOptionPlanOneMember" name="StockOptionPlanOneMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_TaxReformMember" name="TaxReformMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_ReconciliationOfCashCashEquivalentsAndRestricedCashAtEndOfPeriodAbstract" name="ReconciliationOfCashCashEquivalentsAndRestricedCashAtEndOfPeriodAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="HROW_AssetSalesAndNoteReceivableAbstract" name="AssetSalesAndNoteReceivableAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
</schema>
