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Document and Entity Information
May 07, 2020
Document Document And Entity Information [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date May 07, 2020
Entity Registrant Name ACADIA Pharmaceuticals Inc
Entity Central Index Key 0001070494
Entity Emerging Growth Company false
Entity File Number 000-50768
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 06-1376651
Entity Address, Address Line One 3611 Valley Centre Drive
Entity Address, Address Line Two Suite 300
Entity Address, City or Town San Diego
Entity Address, State or Province CA
Entity Address, Postal Zip Code 92130
City Area Code 858
Local Phone Number 558-2871
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of each class Common Stock, par value $0.0001 per share
Trading Symbol ACAD
Security Exchange Name NASDAQ