Date:3/30/2009

diabetes; future activities, results and announcements relating to lorcaserin, including the BLOSSOM results, the submission of an NDA for lorcaserin and the submission of the BLOOM-DM results as a supplement to the NDA; the potential of lorcaserin to meet the FDA's requirements for approval and the approval of lorcaserin for marketing; commercialization options and the coverage of lorcaserin patents; and about Arena's strategy, internal and partnered programs, 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 ability to obtain additional funds, the timing, success and cost of Arena's lorcaserin program and other of its research and development programs, the results of clinical trials or preclinical studies may not be predictive of future results, clinical trials and studies may not proceed at the time or in the manner Arena expects or at all, Arena's ability to partner lorcaserin or other of its compounds or programs, the timing and ability of Arena to receive regulatory approval for its drug candidates, 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                          
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SOURCE  Arena Pharmaceuticals, Inc.
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