(US) ACADIA Pharmaceuticals, Inc. operates as a biopharmaceutical company focused on the development and commercialization of medicines to address unmet medical needs in central nervous system, or CNS, disorders. The firms product include Nuplazid, which is used for the treatment of hallucinations and delusions associated with Parkinson's disease psychosis. The company was founded by Mark R. Brann on July 16, 1993 and is headquartered in San Diego, CA.