EX-99 2 ex99.txt ADDITIONAL EXHIBITS Exhibit 99 Form 4 Joint Filer Information Additional Reporting Person: Novartis Pharma AG Address: Lichstrasse 35 CH-4002, Basel Switzerland Designated Filer: Novartis AG Issuer and Ticker Symbol: Idenix Pharmaceuticals, Inc. (IDIX) Date of Event Requiring Statement: September 2, 2005 Novartis Pharma AG By: /s/ Robert E. Pelzer September 2, 2005 --------------------- ----------------- Name: Robert E. Pelzer Date Title: General Counsel By: /s/ Joseph E. Mamie September 2, 2005 ------------------------------- ----------------- Name: Joseph E. Mamie Date Title: Head Operational Treasury