SAN DIEGO, Sept. 21, 2011 /PRNewswire/ — Arena Pharmaceuticals,
Inc. (NASDAQ:
ARNA) announced today that the company is scheduled to
present at the Sixth Annual JMP Securities Healthcare Conference on
Tuesday, September 27, 2011, at 9:30 a.m. Eastern Time (6:30 a.m.
Pacific Time) at The St. Regis New York Hotel in New York City.
Jack Lief, Arena’s President and Chief Executive Officer, is
scheduled to provide a corporate overview.

A live audio webcast of the presentation will be available under
the investor relations section of Arena’s website at 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 PharmaceuticalsArena is a clinical-stage
biopharmaceutical company focused on discovering, developing and
commercializing oral drugs that target G protein-coupled receptors,
an important class of validated drug targets, in four major
therapeutic areas: cardiovascular, central nervous system,
inflammatory and metabolic diseases. Arena’s most advanced drug
candidate is intended for weight management.

Arena Pharmaceuticals® and Arena® are registered
service marks of the company.

Forward-Looking StatementsCertain statements in this press
release are forward-looking statements that involve a number of
risks and uncertainties. Such forward-looking statements include
statements about the therapeutic indication of Arena’s most
advanced drug candidate and Arena’s focus, goals, strategy,
research and development 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 eve

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