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    <issuer>
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        <issuerName>ENDO HEALTH SOLUTIONS INC.</issuerName>
        <issuerTradingSymbol>ENDP</issuerTradingSymbol>
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            <rptOwnerName>Gergel Ivan P.</rptOwnerName>
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            <rptOwnerStreet1>C/O ENDO HEALTH SOLUTIONS INC.</rptOwnerStreet1>
            <rptOwnerStreet2>1400 ATWATER DRIVE</rptOwnerStreet2>
            <rptOwnerCity>MALVERN</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19355</rptOwnerZipCode>
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            <officerTitle>EVP, R&amp;D and CSO</officerTitle>
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    <footnotes>
        <footnote id="F1">On February 28, 2014, Endo Health Solutions, Inc. (&quot;Endo&quot;) and Paladin Laboratories Inc. (&quot;Paladin&quot;) consummated a transaction under an arrangement agreement pursuant to which each of Endo and Paladin was acquired by a new Irish holding company, Endo International plc (&quot;New Endo&quot;). Under the terms of the arrangement agreement (a) New Endo acquired Paladin pursuant to a plan of arrangement under Canadian law and (b) a newly formed subsidiary of New Endo merged with and into Endo, with Endo as the surviving corporation in the merger (the &quot;Merger&quot;) and an indirect wholly owned subsidiary of New Endo. At the effective time of the Merger, each Endo common share was cancelled and converted into the right to receive one New Endo ordinary share. The number here represents shares of Endo disposed of pursuant to the Merger.</footnote>
        <footnote id="F2">These restricted stock units granted on February 23, 2011 under the 2010 Stock Incentive Plan, of which 9,987 are vested as of February 28, 2014 with the unvested portion generally vesting 25% annually at each remaining grant date anniversary through February 23, 2015, were assumed by New Endo in the Merger and converted into New Endo restricted stock units with the same terms and conditions as the original Endo restricted stock units.</footnote>
        <footnote id="F3">These restricted stock units granted on February 22, 2012 under the 2010 Stock Incentive Plan, of which 6,721 are vested as of February 28, 2014 with the unvested portion generally vesting 25% annually at each remaining grant date anniversary through February 22, 2016, were assumed by New Endo in the Merger and converted into New Endo restricted stock units with the same terms and conditions as the original Endo restricted stock units.</footnote>
        <footnote id="F4">These restricted stock units granted on February 27, 2013 under the 2010 Stock Incentive Plan, of which 1,994 are vested as of February 28, 2014 with the unvested portion generally vesting 25% annually at each remaining grant date anniversary through February 27, 2017, were assumed by New Endo in the Merger and converted into New Endo restricted stock units with the same terms and conditions as the original Endo restricted stock units.</footnote>
        <footnote id="F5">These performance share units granted on February 22, 2012 under the 2010 Stock Incentive Plan were assumed by New Endo in the Merger and converted into New Endo performance share units with the same terms and conditions as the original Endo performance share units. These performance shares vest on December 31, 2014 upon the Company achieving certain financial targets over the period beginning on January 1, 2012 and ending on December 31, 2014. The amount of performance share units included in this line represents the target quantity of shares issuable. The exact number of shares issuable, between 0% and 200% of the target shares, will be based on achievement, as determined by the Compensation Committee of the Board of Directors of Endo, of the specified performance targets over the cumulative 3-year period set forth above.</footnote>
        <footnote id="F6">These performance share units granted on March 8, 2013 under the 2010 Stock Incentive Plan were assumed by New Endo in the Merger and converted into New Endo performance share units with the same terms and conditions as the original Endo performance share units. These performance shares vest on March 1, 2016 upon the Company achieving certain shareholder return targets over the period beginning on January 1, 2013 and ending on December 31, 2015. The amount of performance share units included in this line represents the target quantity of shares issuable. The exact number of shares issuable, between 0% and 300% of the target shares, will be based on achievement, as determined by the Compensation Committee of the Board of Directors of Endo, of the specified shareholder return targets over the cumulative 3-year period set forth above.</footnote>
        <footnote id="F7">These performance share units granted on July 1, 2013 under the 2010 Stock Incentive Plan were assumed by New Endo in the Merger and converted into New Endo performance share units with the same terms and conditions as the original Endo performance share units. These performance shares vest on July 1, 2016 upon the Company achieving certain financial targets over the period beginning on July 1, 2013 and ending on July 1, 2016. The amount of performance share units included in this line represents the target quantity of shares issuable. The exact number of shares issuable, between 0% and 300% of the target shares, will be based on achievement, as determined by the Compensation Committee of the Board of Directors of Endo, of the specified performance targets over the cumulative 3-year period set forth above.</footnote>
        <footnote id="F8">These non-qualified stock options granted on February 19, 2010 under the 2004 Stock Incentive Plan, which are fully vested as of February 28, 2014, were assumed by New Endo in the Merger and converted into options to purchase ordinary shares of New Endo for the listed exercise price per share with the same terms and conditions as the original Endo stock options.</footnote>
        <footnote id="F9">These non-qualified stock options granted on February 23, 2011 under the 2010 Stock Incentive Plan, of which 31,162 are vested as of February 28, 2014 with the unvested portion generally vesting 25% per year on each remaining grant date anniversary through February 23, 2015, were assumed by New Endo in the Merger and converted into options to purchase ordinary shares of New Endo for the listed exercise price per share with the same terms and conditions as the original Endo stock options.</footnote>
        <footnote id="F10">These non-qualified stock options granted on February 22, 2012 under the 2010 Stock Incentive Plan, of which 22,126 are vested as of February 28, 2014 with the unvested portion generally vesting 25% per year on each remaining grant date anniversary through February 22, 2016, were assumed by New Endo in the Merger and converted into options to purchase ordinary shares of New Endo for the listed exercise price per share with the same terms and conditions as the original Endo stock options.</footnote>
        <footnote id="F11">These non-qualified stock options granted on February 27, 2013 under the 2010 Stock Incentive Plan, of which 6,607 are vested as of February 28, 2014 with the unvested portion generally vesting 25% per year on each remaining grant date anniversary through February 27, 2017, were assumed by New Endo in the Merger and converted into options to purchase ordinary shares of New Endo for the listed exercise price per share with the same terms and conditions as the original Endo stock options.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Caroline B. Manogue, by power of attorney</signatureName>
        <signatureDate>2014-03-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
