Pharmasset Presents R7128 Phase 1 Single Ascending Dose Study in Healthy ...(ements Pharmasset Safe Harbor State...),Health

Pharmasset "Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: Statements in this press release regarding our business that are not historical facts are "forward-looking statements" that involve risks and uncertainties including without limitation, the risk that there will be a delay in the presentation of safety, tolerability, pharmacokinetic and food effect data from the R7128 Phase 1 single ascending dose study, the risk that there will be a delay in the release of R7128 safety, tolerability, pharmacokinetic and antiviral efficacy data from the R7128 Phase 1 multiple ascending dose study, the risk that the R7128 data from the Phase 1 R7128 single ascending dose study is not accurate or representative, the risk that the preliminary data from the R7128 Phase 1 multiple ascending dose study is not accurate or representative, the risk that our collaboration with Roche will not continue or will not be successful, the risk that the on-going or anticipated clinical trials for any one or more of our product candidates will not be successful and the risk that any one or more of our product candidates will not be successfully developed and commercialized. For a discussion of these risks and uncertainties, any of which could cause our actual results to differ from those contained in the forward-looking statements, see the section of our Quarterly Report on Form 10-Q for the quarter ended June 30, 2007 filed with the Securities and Exchange Commission entitled "Risk Factors" and discussions of potential risks and uncertainties in our subsequent filings with the Securities and Exchange Commission.