ACADIA Pharmaceuticals to Announce Third Quarter 2009 Financial Results on November 9, 2009

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 third quarter ended September 30, 2009 on Monday, November 9, 2009, after the U.S. financial markets close. ACADIA's management will host a conference call and webcast on Monday, November 9, 2009, at 5:00 p.m. Eastern Time to discuss ACADIA's financial results and development programs.

The conference call may be accessed by dialing 866-510-0707 for participants in the U.S. or Canada and 617-597-5376 for international callers (reference passcode 92783090). A telephone replay of the conference call may be accessed through November 23, 2009 by dialing 888-286-8010 for callers in the U.S. or Canada and 617-801-6888 for international callers (reference passcode 21130876). 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 November 23, 2009.

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's product candidates include pimavanserin in Phase III for Parkinson's disease psychosis in collaboration with Biovail, a product candidate in Phase II for chronic pain and a product candidate in Phase I for glaucoma, both in collaboration with Allergan, and AM-831 in IND-track development in collaboration with Meiji Seika Kaisha. All of the product candidates in ACADIA's pipeline emanate from discoveries made using its proprietary drug discovery platform. ACADIA maintains a website at www.acadia-pharm.com to which ACADIA regularly posts copies of its press releases as well as additional information and through which interested parties can subscribe to receive email alerts.

SOURCE: ACADIA Pharmaceuticals Inc.

ACADIA Pharmaceuticals Inc. 
Thomas H. Aasen, Vice President and Chief Financial Officer 
858-558-2871

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