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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 XoKEUO37O7DJV+K7aqStBw==

<SEC-DOCUMENT>0001209191-10-001384.txt : 20100105
<SEC-HEADER>0001209191-10-001384.hdr.sgml : 20100105
<ACCEPTANCE-DATETIME>20100105175841
ACCESSION NUMBER:		0001209191-10-001384
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20091231
FILED AS OF DATE:		20100105
DATE AS OF CHANGE:		20100105

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Onaitis Matthew
		CENTRAL INDEX KEY:			0001362822

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-51665
		FILM NUMBER:		10508788

	MAIL ADDRESS:	
		STREET 1:		C/O SOMAXON PHARMACEUTICALS, INC.
		STREET 2:		12750 HIGH BLUFF DRIVE, SUITE 310
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92130

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Somaxon Pharmaceuticals, Inc.
		CENTRAL INDEX KEY:			0001339455
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				200161599
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		420 STEVENS AVENUE
		STREET 2:		SUITE 210
		CITY:			SOLANA BEACH
		STATE:			CA
		ZIP:			92075
		BUSINESS PHONE:		(858) 480-0400

	MAIL ADDRESS:	
		STREET 1:		420 STEVENS AVENUE
		STREET 2:		SUITE 210
		CITY:			SOLANA BEACH
		STATE:			CA
		ZIP:			92075
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-12-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001339455</issuerCik>
        <issuerName>Somaxon Pharmaceuticals, Inc.</issuerName>
        <issuerTradingSymbol>SOMX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001362822</rptOwnerCik>
            <rptOwnerName>Onaitis Matthew</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>SOMAXON PHARMACEUTICALS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>3830 VALLEY CENTRE DRIVE, SUITE 705-461</rptOwnerStreet2>
            <rptOwnerCity>SAN DIEGO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92130</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP, General Counsel</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-12-31</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.07</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>50712</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This sale of shares of common stock underlying vested restricted stock units was effected by the reporting person pursuant to a Rule 10b5-1 trading plan adopted by the reporting person, with the proceeds remitted to the Company to cover the taxes withheld upon the vesting of 12,500 restricted stock units on December 31, 2009.</footnote>
        <footnote id="F2">Reflects the weighted average sale price of the shares sold. The shares were sold in multiple trades at prices ranging from $1.05 to $1.09 per share. The reporting person will provide to the SEC staff, the issuer or a security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price.</footnote>
        <footnote id="F3">Reflects the forfeiture on December 31, 2009 of 18,848 restricted stock units that expired unvested.  The vesting of such restricted stock units depended upon the Company raising aggregate proceeds of $25 million from one or more financing or strategic transactions during 2009, and that condition was not met.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Matthew Onaitis</signatureName>
        <signatureDate>2010-01-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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