Concerning psilocybin.

Washington State's SB 5921 establishes a legal medical program for psilocybin use under the Department of Health, allowing licensed clinicians to prescribe it for qualified patients (18+ years) with diagnosed conditions determined by the clinician. The bill creates clear rules for inpatient treatment sessions, outpatient microdosing, and strict requirements for producers (growers/manufacturers) and clinicians. It provides legal protections from prosecution for program participants but maintains existing laws for non-program activities like driving under influence or recreational use. The program explicitly excludes use for individuals under 18, animals, and does not override federal laws governing clinical trials.