Arena Pharmaceuticals, Inc. (ARNA) to Ring the NASDAQ Stock Market Opening Bell


ADVISORY, Sept. 11, 2007 (PRIME NEWSWIRE) --



 What:
 Dominic Behan, Ph.D., Co-Founder and Chief Scientific Officer, and
 William Shanahan, M.D., Chief Medical Officer of Arena
 Pharmaceuticals, Inc. (ARNA), will preside over the opening bell.

 Where:
 NASDAQ MarketSite - 4 Times Square - 43rd and Broadway - Broadcast
 Studio

 When:
 Wednesday, September 12, 2007 at 9:30 a.m. ET

 Contacts:
 David Walsey
 Director, Corporate Communications
 Arena Pharmaceuticals, Inc.
 858.531.7778

 NASDAQ MarketSite:
 Jolene Libretto; 646.441.5220; mobile - 347.219.9539
 Jolene.Libretto@NASDAQ.com

Feed Information:

The opening bell is available from 9:20 a.m. to 9:35 a.m. on Galaxy 26, downlink frequency 4180 horizontal. The feed can also be found on Waterfront fiber 1623. If you have any questions, please contact Jolene Libretto at (646) 441-5220.

Radio Feed:

An audio transmission of the opening bell is also available from 9:20 a.m. to 9:35 a.m. on uplink IA6 C band / transponder 24, downlink frequency 4180 horizontal. The feed can be found on Waterfront fiber 1623 as well.

Webcast:

A live webcast of the NASDAQ Opening Bell will be available at: http://www.nasdaq.com/reference/marketsite_about.stm.

Photos:

To obtain a hi-resolution photograph of the Market Open, please go to http://www.nasdaq.com/reference/marketsite_events.stm and click on the market open of your choice.

About Arena Pharmaceuticals, Inc. (ARNA):

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 product candidate, lorcaserin, is being investigated in a Phase 3 clinical trial program for the treatment of obesity. Arena's broad pipeline of novel compounds targeting G protein-coupled receptors, an important class of validated drug targets, includes compounds being evaluated independently and with its partners, 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.