<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2016-07-23</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000754813</issuerCik>
        <issuerName>HealthWarehouse.com, Inc.</issuerName>
        <issuerTradingSymbol>HEWA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001276079</rptOwnerCik>
            <rptOwnerName>ROSS BRIAN A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4410 CARVER WOODS, DR., STE 103</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BLUE ASH</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>45242</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Member of a 10% Owner Group</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The Reporting Person (&quot;RP&quot;) is filing this report because the RP is a member of a Section 13D group, as disclosed in the Schedule 13D report originally filed with the SEC on August 2, 2016 filed on behalf of the RP and the other members of such group. As of the date of the event requiring this statement, the group beneficially owned an aggregate 19,062,600 shares and consisted of the following: RX Investor Value Corp., Jeffrey T. Holtmeier, GENext, LLC, Robert Smyjunas, Cormag Holdings, Ltd., Mark Douglas Scott, Osgar Holdings, Ltd., Hong Penner, Bruce Bedrick, Patrick Delaney, Stephen J. Weiss, SCW Holdings, LLP, Lynn Peppel, Cape Bear Partners, LLC, Arthur W. Liberati, LFLP, Ltd., Patricia Corona, Estate of Wayne Corona, Vincent Rinaldi, and Brian Ross. The RP disclaims beneficial ownership of the shares held by the other members of such Section 13(d) group except to the extent of the RP's pecuniary interest therein.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Brian Ross</signatureName>
        <signatureDate>2016-08-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
