Pharmasset, Inc. to Present at the UBS Warburg Global Life Sciences Conference on Monday, September 24th

PRINCETON, N.J., Sept. 18 /PRNewswire-FirstCall/ -- Pharmasset, Inc. announced today that its management will be presenting at the UBS Global Life Sciences Conference being held from September 24 - 27, 2007 in New York, New York. Schaefer Price, Pharmasset's President & Chief Executive Officer, will provide an overview of the company on Monday, September 24, 2007 at 9:00 AM (ET).

To access a simultaneous webcast of the presentation via the internet, log on to the "Events & Presentations" section of the Investor Center on Pharmasset's website at http://investor.pharmasset.com/events.cfm. Please connect to the website at least ten minutes prior to the start of the presentation to ensure adequate time for a reliable connection and any software download that may be necessary for the webcast.

The archived replay of the webcast will be available on Pharmasset's website for two weeks following the conference. The investor presentation will be available for download in PDF format following the presentation in the "Events & Presentations" section of the Investor Center on Pharmasset's website at http://investor.pharmasset.com/events.cfm.

About Pharmasset

Pharmasset is a clinical-stage pharmaceutical company committed to discovering, developing and commercializing novel drugs to treat viral infections. Pharmasset's primary focus is on the development of oral therapeutics for the treatment of hepatitis B virus (HBV), hepatitis C virus (HCV) and human immunodeficiency virus (HIV).

Pharmasset is currently developing three product candidates. Clevudine, for the treatment of chronic HBV infection, is expected to enter Phase 3 clinical trials for registration in the Americas and Europe. Clevudine is already approved for HBV in South Korea and marketed by Bukwang Pharmaceuticals under the brand name Levovir. R7128, an oral treatment for chronic HCV infection, is in an adaptive Phase 1 clinical trial through a strategic collaboration with Roche. Racivir, which is being developed for the treatment of HIV in combination with other approved HIV drugs, has completed a Phase 2 clinical trial.

Contact Alan Roemer, Vice President Investor Relations & Corporate Communications alan.roemer@pharmasset.com Office: (609) 613-4125

Pharmasset

CONTACT: Alan Roemer, Vice President, Investor Relations & CorporateCommunications, Pharmasset, +1-609-613-4125, alan.roemer@pharmasset.com

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