<SEC-DOCUMENT>0001415889-12-000112.txt : 20120131
<SEC-HEADER>0001415889-12-000112.hdr.sgml : 20120131
<ACCEPTANCE-DATETIME>20120131163616
ACCESSION NUMBER:		0001415889-12-000112
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20120127
FILED AS OF DATE:		20120131
DATE AS OF CHANGE:		20120131

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Wells William McDowall
		CENTRAL INDEX KEY:			0001476860

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-50768
		FILM NUMBER:		12559666

	MAIL ADDRESS:	
		STREET 1:		OCEAN ONE, UNIT 304, MAXWELL COAST ROAD
		CITY:			OISTINS
		STATE:			C8
		ZIP:			BB17154

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ACADIA PHARMACEUTICALS INC
		CENTRAL INDEX KEY:			0001070494
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				061376651
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3911 SORRENTO VALLEY BLVD
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
		BUSINESS PHONE:		858-558-2871

	MAIL ADDRESS:	
		STREET 1:		3911 SORRENTO VALLEY BLVD
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>form3-01312012_010108.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0204</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2012-01-27</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001070494</issuerCik>
        <issuerName>ACADIA PHARMACEUTICALS INC</issuerName>
        <issuerTradingSymbol>ACAD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001476860</rptOwnerCik>
            <rptOwnerName>Wells William McDowall</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ACADIA PHARMACEUTICALS INC.</rptOwnerStreet1>
            <rptOwnerStreet2>3911 SORRENTO VALLEY BLVD.</rptOwnerStreet2>
            <rptOwnerCity>SAN DIEGO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92121</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>/s/ Glenn F. Baity, Attorney-in-Fact</signatureName>
        <signatureDate>2012-01-31</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>ex24-01312012_010108.htm
<TEXT>
<!DOCTYPE html PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<title>POWER OF ATTORNEY</title>
<meta name="author" content="pmathews">
<meta name="date" content="01/31/2012">
</head>
<body style="margin-top:0;font-family:Times New Roman; font-size:10pt; color:#000000">
<p style="margin:0px; font-size:12pt" align="center"><b>POWER OF ATTORNEY</b></p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px; text-indent:48px; font-size:12pt" align="justify">Know all by these presents, that the undersigned hereby authorizes <b>Uli Hacksell</b>, <b>Thomas H. Aasen, Glenn F. Baity</b> or <b>Kirk V. Crawford</b> to execute for and on behalf of the undersigned, in the undersigned's capacity as a director of <b>ACADIA Pharmaceuticals Inc.</b> (the "Company"), Forms 3, 4 and 5 and any Amendments thereto, and cause such form(s) to be filed with the Securities and Exchange Commission pursuant to Section 16(a) of the Securities Exchange Act of 1934, relating to the undersigned's beneficial ownership of securities in the Company. &nbsp;The undersigned hereby grants to such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or substitute or substitutes of such attorney-in-fact, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. &nbsp;The undersigned acknowledges that the foregoing attorney-in-fact, in serving in such capacity at the request of the undersigned, is not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of 1934.</p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px; text-indent:48px; font-size:12pt" align="justify">This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned's holdings of, and transactions in, securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorney-in-fact.</p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px; text-indent:48px; font-size:12pt" align="justify">IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed this 27<sup>th</sup> day of January, 2012.</p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px" align="justify"><br></p>
<p style="margin:0px; font-size:12pt" align="justify"><u>/s/ Bill Wells</u></p>
<p style="margin:0px; font-size:7.2pt" align="justify">WILLIAM M. WELLS</p>
<p style="margin:0px"><br></p>
<p style="margin:0px"><br><br><br></p>
</body>
</html>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
