IDIX (MM)

Idenix Pharmaceuticals, Inc. (Nasdaq:IDIX) announced today that Idenix management will present a corporate overview at the Oppenheimer 23rd Annual Healthcare Conference on Wednesday, December 12th, 2012 at 2:45 p.m. ET at the Waldorf Astoria, New York City.

The live and archived webcast of the company presentation can be accessed under "Events & Presentations" in the Idenix Investor Center at www.idenix.com. Please log in approximately 5-10 minutes before the event to ensure a timely connection. The archived replay will be available on the Idenix website for two weeks following the conference. 

About Idenix

Idenix Pharmaceuticals, Inc., headquartered in Cambridge, Massachusetts, is a biopharmaceutical company engaged in the discovery and development of drugs for the treatment of human viral diseases. Idenix's current focus is on the treatment of patients with hepatitis C infection. For further information about Idenix, please refer to http://www.idenix.com.

CONTACT: Idenix Pharmaceuticals Contact:
         Kelly Barry (617) 995-9033 (media)
         Teri Dahlman (617) 995-9807 (investors)