Psilocybin-Assisted Psychotherapy in Adults With Alcohol Use Disorder (AUD)

Inclusion Criteria: * Moderate to severe diagnosis of AUD as measured by Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5) criteria using Structured Clinical Interview for DSM-5 by the investigator. * Expressed a wish to reduce or stop alcohol consumption. * Generally healthy with no unstable medical conditions, as determined by medical history, physical examination, routine blood labs, electrocardiogram, urine analysis, and urine toxicology. Exclusion Criteria: * Diagnosed with or having a family history of any of the following concomitant psychiatric disorders: schizophrenia or prodromal symptoms, any bipolar disorder, obsessive compulsive disorder, or other psychotic episode. Recent (within last 12 months) diagnosis of a major depressive disorder (MDD) (HAM-D score \>19), treatment resistant depression (TRD), post-traumatic stress disorder (PTSD), panic disorder, or eating disorders. * Subjects deemed unfit for psilocybin-assisted therapy based on the assessments made during psychotherapy sessions prior to the first psilocybin-assisted psychotherapy session. * History of hallucinogen use disorder, or any use in the past 1 year, or \>25 lifetime uses.