American Psychiatric Association

The American Psychiatric Association (APA) is the world's largest psychiatric professional association with over 37,000 physician members, and publisher of the American Journal of Psychiatry and the DSM diagnostic standards. In 2022 the APA issued a landmark position statement on psychedelics, acknowledging promising early evidence for psilocybin and MDMA-assisted therapy while calling for rigorous research and caution against clinical use outside approved investigational settings.