Date:3/23/2009

rtnered 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, clinical trials and studies may not proceed at the time or in the manner Arena expects or at all, the results of clinical trials or preclinical studies may not be predictive of future results, Arena's ability to receive regulatory approval for its drug candidates, Arena's ability to partner lorcaserin 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
               Senior Director, Corporate Communications

               Arena Pharmaceuticals, Inc.
               858.453.7200, ext. 1682

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SOURCE Arena Pharmaceuticals, Inc. Copyright©2009 PR Newswire. All rights reserved

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