Arena Pharmaceuticals, Inc.
Apr 11, 2003

Arena Pharmaceuticals, Inc. Announces First Quarter 2003 Earnings Release Date and Conference Call

SAN DIEGO, Apr 11, 2003 (BUSINESS WIRE) -- Arena Pharmaceuticals, Inc. (NASDAQ: ARNA) announced today that it will release its first quarter financial results for the period ended March 31, 2003, after the NASDAQ National Market closes on Wednesday, April 23, 2003, and will host both a telephone and Internet first quarter conference call on Thursday, April 24, 2003, at 9:30 a.m. Eastern Time (6:30 a.m. San Diego Time).

Jack Lief, President and Chief Executive Officer, and Joseph Mooney, Chief Financial Officer, will discuss the first quarter results, the progress of Arena's collaborations and other topics. A Question and Answer session will follow the presentation. To access by telephone, dial in toll free at (888) 273-9891 (the international dial in number is (651) 224-7582), and specify that you would like to join the "First Quarter Earnings Conference Call." To access the call via the Internet, go to and click on "Investor Relations." Then, click on "Calendar of Events." The conference call will be listed at the top of the page. Click on the "Live Webcast" link. Then, follow the links and instructions provided. Listening to the conference call on the Internet will require speakers and Microsoft Windows Media Player. An archive of the webcast will be available on Arena's website until May 1, 2003

Arena is a biopharmaceutical company focusing on G protein-coupled receptors.

Arena Pharmaceuticals, Inc. Jack Lief, 858/453-7200 ext. 223 Joseph Mooney, 858/453-7200 ext. 508