Robert Hoffman to Rejoin Arena Pharmaceuticals as Vice President, Finance and Chief Financial Officer

Arena Pharmaceuticals, Inc. ARNA today announced that Robert E. Hoffman will rejoin Arena on August 29, 2011, as Vice President, Finance and Chief Financial Officer. Mr. Hoffman served in various financial positions with Arena for over 13 years before departing in March to work for a private biopharmaceutical company. "Robert is a valuable leader who has been a key contributor to Arena," said Jack Lief, Arena's President and Chief Executive Officer. "Robert's return comes at an important time for Arena as we prepare to respond to the lorcaserin complete response letter." Mr. Hoffman, 45, currently serves as a member of the Financial Accounting Standards Board's small business advisory committee and the steering committee of the Association of Bioscience Financial Officers. He is also a member and a former director and President of the San Diego Chapter of Financial Executives International. "I look forward to again working closely with my colleagues to support Arena's efforts to seek FDA approval of lorcaserin and to advance select earlier-stage research and development programs," said Mr. Hoffman.