Arena Pharmaceuticals Continues Phase 3 BLOOM Obesity Trial Following Independent Echocardiogaphic Data Safety Monitoring Bo...(s Arena's ability to partner lorcaserin ...)

Date:9/11/2007

s, 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 Mary Claire Duch

President and CEO WeissComm Partners

Media Relations

David Walsey 212.301.7228

Director, Corporate Communications

Arena Pharmaceuticals, Inc.

858.453.7200, ext. 1682

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SOURCE Arena Pharmaceuticals Copyright©2007 PR Newswire. All rights reserved

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