NEW HAVEN, Conn., Dec. 18, 2008 (GLOBE NEWSWIRE) -- Achillion Pharmaceuticals, Inc. (Nasdaq:ACHN), a leader in the discovery and development of small molecule drugs to combat the most challenging infectious diseases, today announced the appointment of Dennis C. Liotta, Ph.D. to its Board of Directors. Dr. Liotta will fill the vacancy created by the departure of Jean-Francois Formela, M.D.