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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 MNutptSiHuw44q93kxxapD2J/1Wph5tLTTaxy6N3k/evAZQ7PcBW+q5yw95ec/l4
 APL1HH8GWlSDvqY9/FFBiA==

<SEC-DOCUMENT>9999999995-09-003610.txt : 20091228
<SEC-HEADER>9999999995-09-003610.hdr.sgml : 20091225
<ACCEPTANCE-DATETIME>20091228001513
ACCESSION NUMBER:		9999999995-09-003610
CONFORMED SUBMISSION TYPE:	EFFECT
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20091224
DATE AS OF CHANGE:		20091228
EFFECTIVENESS DATE:		20091224

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			OPTIMER PHARMACEUTICALS INC
		CENTRAL INDEX KEY:			0001142576
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				330830300
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		EFFECT
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-163606
		FILM NUMBER:		091260552

	BUSINESS ADDRESS:	
		STREET 1:		10110 SORRENTO VALLEY ROAD
		STREET 2:		SUITE C
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
		BUSINESS PHONE:		8589090736

	MAIL ADDRESS:	
		STREET 1:		10110 SORRENTO VALLEY ROAD
		STREET 2:		SUITE C
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
</SEC-HEADER>
<DOCUMENT>
<TYPE>EFFECT
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0101</schemaVersion>

    <submissionType>EFFECT</submissionType>

    <act>33</act>

    <testOrLive>LIVE</testOrLive>

    <effectiveData>
        <finalEffectivenessDispDate>2009-12-24</finalEffectivenessDispDate>
        <finalEffectivenessDispTime>10:00:00</finalEffectivenessDispTime>
        <form>S-3</form>
        <filer>
            <cik>0001142576</cik>
            <entityName>OPTIMER PHARMACEUTICALS INC</entityName>
            <fileNumber>333-163606</fileNumber>
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</TEXT>
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