Switzerland operates a unique program allowing controlled use of psychedelics (LSD, psilocybin) and MDMA to help patients with serious mental health conditions that haven’t responded to standard treatments. Since 2014, about 100 doctors have treated 700+ patients with these substances as part of therapy sessions. The program requires careful patient screening, informed consent, and outcome reporting, with patients typically receiving 2-4 treatments over 12 months. Most patients showed significant improvement in their conditions, though some experienced side effects like nausea or headaches.