Arena Pharmaceuticals to Participate in the SIGnificant Investment Options in Healthcare Conference

26 February 2007

Arena Pharmaceuticals, Inc. (Nasdaq: ARNA) announced today that the company is scheduled to participate at the Susquehanna International Group's SIGnificant Investment Options in Healthcare Conference on Thursday, March 1, 2007 at the Omni Berkshire Place in New York City. David A. Walsey, Arena's Director of Corporate Communications, is scheduled to participate in the panel discussion "The Obesity Opportunity -- Calling for Drug Hunters" at 1:00 p.m. Eastern Time (10:00 a.m. Pacific Time).

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 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.

Forward-Looking Statements

Certain statements in this press release are forward-looking statements that involve a number of risks and uncertainties. Such forward-looking statements include statements about Arena's strategy, preclinical and internal and partnered clinical programs, including the lorcaserin program, and ability to develop compounds and commercialize drugs. For such statements, Arena claims the protection of the Private Securities Litigation Reform Act of 1995. Actual events or results may differ materially from Arena's expectations. Factors that could cause actual results to differ materially from the forward-looking statements include, but are not limited to, Arena's planned clinical trials may not proceed at the time Arena expects or at all, the results of preclinical studies or clinical trials may not be predictive of future results, Arena's ability to partner lorcaserin, APD125, APD791 or other of its compounds or programs, the timing, success and cost of Arena's research, out-licensing endeavors and clinical trials, Arena's ability to obtain additional financing, Arena's ability to obtain and defend its patents, and the timing and receipt of payments and fees, if any, from Arena's collaborators. Additional factors that could cause actual results to differ materially from those stated or implied by Arena's forward-looking statements are disclosed in Arena's filings with the Securities and Exchange Commission. These forward-looking statements represent Arena's judgment as of the time of this release. Arena disclaims any intent or obligation to update these forward-looking statements, other than as may be required under applicable law.

Contacts: Jack Lief E. Blair Schoeb

President and CEO WeissComm Partners

Media Relations

David Walsey 760.365.1857

Director, Corporate Communications

Arena Pharmaceuticals, Inc.

858.453.7200, ext. 1682

http://www.arenapharm.com

Source: prnewswire

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