Conference Call and Webcast InformationACADIA will host a conference call and webcast with slides today, November 27, 2012 at 8:00 a.m. Eastern Time to present the top-line results from its pivotal Phase III trial with pimavanserin in patients with PDP. The conference call can be accessed by dialing 866-783-2140 for participants in the U.S. and Canada and 857-350-1599 for international callers (reference passcode 26249437). The conference call will be webcast live on ACADIA’s website, www.acadia-pharm.com, under the investors section and will be archived there until December 11, 2012. A telephone replay also may be accessed through December 11, 2012 by dialing 888-286-8010 for participants in the U.S. and Canada and 617-801-6888 for international callers (reference passcode 47904115). About Pimavanserin Pimavanserin is ACADIA’s proprietary small molecule that acts selectively as an antagonist/inverse agonist on serotonin 5-HT 2A receptors and is in Phase III development as a potential first-in-class treatment for Parkinson’s disease psychosis. Pimavanserin can be taken orally as a tablet once-a-day. ACADIA discovered pimavanserin and holds worldwide rights to this new chemical entity. About Parkinson’s Disease Psychosis According to the National Parkinson’s Foundation, about one million people in the United States and from four to six million people worldwide suffer from Parkinson’s disease. Parkinson’s disease psychosis, or PDP, is a debilitating disorder that develops in up to 60 percent of patients with Parkinson’s disease. Currently, there is no FDA-approved therapy to treat PDP in the United States. PDP, commonly consisting of visual hallucinations and delusions, substantially contributes to the burden of Parkinson’s disease and deeply affects the quality of life of patients. PDP is associated with increased caregiver stress and burden, nursing home placement, and increased morbidity and mortality. There is a large unmet medical need for new therapies that will effectively treat PDP without compromising motor control in patients with Parkinson’s disease.