August 2, 2006 General News

ACADIA Pharmaceuticals to Announce Second Quarter 2006 Financial Results on August 8, 2006; ACADIA to Host Conference Call and Webcast on Tuesday, August 8, 2006, at 5:00 p.m. Eastern Time

SAN DIEGO–(BUSINESS WIRE)–Aug. 2, 2006–ACADIA Pharmaceuticals Inc. (Nasdaq:ACAD), a biopharmaceutical company utilizing innovative technology to fuel drug discovery and clinical development of novel treatments for central nervous system disorders, today announced that it will report its unaudited financial results for the second quarter ended June 30, 2006 on Tuesday, August 8, 2006, after the U.S. financial markets close.

Uli Hacksell, Ph.D., Chief Executive Officer, and Thomas H. Aasen, Vice President and Chief Financial Officer, will host a conference call and webcast on Tuesday, August 8, 2006 at 5:00 p.m. Eastern Time to discuss ACADIA’s financial results and development programs.

The conference call may be accessed by dialing 866-356-4279 for participants in the U.S. or Canada and 617-597-5394 for international callers (reference passcode 64732251). A telephone replay of the conference call may be accessed through August 22, 2006 by dialing 888-286-8010 for callers in the U.S. or Canada and 617-801-6888 for international callers (reference passcode 41993620). The conference call also will be webcast live on ACADIA’s website, www.acadia-pharm.com, under the investors section and will be archived there until August 22, 2006.

About ACADIA Pharmaceuticals

ACADIA is a biopharmaceutical company utilizing innovative technology to fuel drug discovery and clinical development of novel treatments for central nervous system disorders. ACADIA currently has five Phase II-stage clinical programs as well as a portfolio of preclinical and discovery assets directed at large unmet medical needs, including schizophrenia, Parkinson’s disease, sleep maintenance insomnia, and neuropathic pain. All of the drug candidates in ACADIA’s product pipeline emanate from discoveries made using its proprietary drug discovery platform. ACADIA’s corporate headquarters is located in San Diego, California and it maintains research and development operations in both San Diego and Malmo, Sweden.

CONTACT: ACADIA Pharmaceuticals Inc.
Lisa Barthelemy, Director, Investor Relations
Thomas H. Aasen, Vice President and Chief Financial Officer
(858) 558-2871

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