LEXINGTON, Mass.--(BUSINESS WIRE)--June 12, 2006--Cubist Pharmaceuticals, Inc. (Nasdaq: CBST - News) today announced the appointment of Sylvie Gregoire, Pharm. D., to its Board of Directors. Dr. Gregoire, who has twenty years of pharmaceutical and biotech industry experience, also serves on the boards of IDM-Pharma, a publicly traded company headquartered in San Diego, CA and Caprion Pharmaceuticals, Inc., a privately-owned biotechnology company in Montreal, Canada