<SEC-DOCUMENT>0000721371-16-000299.txt : 20160822
<SEC-HEADER>0000721371-16-000299.hdr.sgml : 20160822
<ACCEPTANCE-DATETIME>20160822164459
ACCESSION NUMBER:		0000721371-16-000299
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20160818
FILED AS OF DATE:		20160822
DATE AS OF CHANGE:		20160822

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CARDINAL HEALTH INC
		CENTRAL INDEX KEY:			0000721371
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-DRUGS PROPRIETARIES & DRUGGISTS' SUNDRIES [5122]
		IRS NUMBER:				310958666
		STATE OF INCORPORATION:			OH
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		7000 CARDINAL PLACE
		CITY:			DUBLIN
		STATE:			OH
		ZIP:			43017
		BUSINESS PHONE:		6147573033

	MAIL ADDRESS:	
		STREET 1:		7000 CARDINAL PLACE
		CITY:			DUBLIN
		STATE:			OH
		ZIP:			43017

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CARDINAL DISTRIBUTION INC
		DATE OF NAME CHANGE:	19920703

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LAWS STUART G
		CENTRAL INDEX KEY:			0001404127

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-11373
		FILM NUMBER:		161845693

	MAIL ADDRESS:	
		STREET 1:		CARDINAL HEALTH, INC.
		STREET 2:		7000 CARDINAL PLACE
		CITY:			DUBLIN
		STATE:			OH
		ZIP:			43017
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_147189868583485.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2016-08-18</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000721371</issuerCik>
        <issuerName>CARDINAL HEALTH INC</issuerName>
        <issuerTradingSymbol>CAH</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001404127</rptOwnerCik>
            <rptOwnerName>LAWS STUART G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>CARDINAL HEALTH, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>7000 CARDINAL PLACE</rptOwnerStreet2>
            <rptOwnerCity>DUBLIN</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>43017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP &amp; Chief Accounting Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2016-08-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>9703</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>82.45</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2718</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The price reported in column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $82.41 to $82.84, inclusive.  The reporting person undertakes to provide to Cardinal Health, Inc., any security holder of Cardinal Health, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote 1 to this Form 4.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Elaine S. Natsis, Attorney-in-fact</signatureName>
        <signatureDate>2016-08-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
