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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,
 QaSQQBvJmr9wlZl1eXfOUQVO+kSnkgygo0sllBuChHDIbFJ5AXSk5FWnNVqX66WP
 x7Q5PM7W/XRbdtB5uUOwlA==

<SEC-DOCUMENT>9999999995-08-003163.txt : 20081020
<SEC-HEADER>9999999995-08-003163.hdr.sgml : 20081020
<ACCEPTANCE-DATETIME>20081020001530
ACCESSION NUMBER:		9999999995-08-003163
CONFORMED SUBMISSION TYPE:	EFFECT
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20081017
DATE AS OF CHANGE:		20081020
EFFECTIVENESS DATE:		20081017

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			IDENIX PHARMACEUTICALS INC
		CENTRAL INDEX KEY:			0001093649
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				450478605

	FILING VALUES:
		FORM TYPE:		EFFECT
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-153471
		FILM NUMBER:		081130398

	BUSINESS ADDRESS:	
		STREET 1:		60 HAMPSHIRE STREET
		STREET 2:		.
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		(617) 995-9800

	MAIL ADDRESS:	
		STREET 1:		60 HAMPSHIRE STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NOVIRIO PHARMACEUTICALS LTD
		DATE OF NAME CHANGE:	19990820
</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>2008-10-17</finalEffectivenessDispDate>
        <finalEffectivenessDispTime>16:00:00</finalEffectivenessDispTime>
        <form>S-3</form>
        <filer>
            <cik>0001093649</cik>
            <entityName>IDENIX PHARMACEUTICALS INC</entityName>
            <fileNumber>333-153471</fileNumber>
        </filer>
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</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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