Cubist Pharmaceuticals Commences Tender Offer for All Outstanding Shares of Adolor for $4.25 per Share

Cubist Pharmaceuticals, Inc. CBST today announced the commencement of its tender offer for all outstanding shares of the common stock of Adolor Corporation ADLR for $4.25 per share in cash, plus one nontransferable Contingent Payment Right (CPR) entitling the holder to receive additional cash payments of up to $4.50 for each share tendered if certain regulatory approvals and/or commercialization milestones for ADL5945 are achieved. The tender offer is being made by FRD Acquisition Corporation, a wholly-owned subsidiary of Cubist, pursuant to the previously announced Agreement and Plan of Merger, dated as of October 24, 2011, for Cubist to acquire Adolor.