Arena Pharmaceuticals to Present at the Natixis Bleichroeder Second Annual Hidden Gems Conference

Arena Pharmaceuticals, Inc. (NASDAQ:ARNA) announced today that the company is scheduled to present at the Natixis Bleichroeder Second Annual Hidden Gems Conference on October 13, 2008 at 8:00 a.m. Eastern Time (5:00 a.m. Pacific Time) at the Waldorf=Astoria Hotel in New York City. Robert E. Hoffman, Arena's Vice President, Finance and Chief Financial Officer, is scheduled to provide an overview of the company, including its clinical development and discovery programs.

A live audio webcast of the presentation will be available under the investor relations section of Arena's website at http://www.arenapharm.com/. A replay of the presentation will be available for 30 days following the event. Please connect to Arena's website several minutes prior to the start of the webcast to ensure adequate time for any software download that may be necessary.

About Arena Pharmaceuticals

Arena is a clinical-stage biopharmaceutical company focused on discovering, developing and commercializing oral drugs in four major therapeutic areas: cardiovascular, central nervous system, inflammatory and metabolic diseases. Arena's most advanced drug candidate, lorcaserin, is being investigated in a Phase 3 clinical trial program for the treatment of obesity. Arena's broad pipeline of novel compounds target G protein-coupled receptors, an important class of validated drug targets, and includes compounds being evaluated independently and with partners, including Merck & Co., Inc. and Ortho-McNeil Pharmaceutical, Inc.

Arena Pharmaceuticals(R) and Arena(R) are registered service marks of the company. "APD" is an abbreviation for Arena Pharmaceuticals Development.