This Phase II, double-blind, placebo-controlled trial (n=40) will investigate the safety, effectiveness, and lasting effects of psilocybin (25mg) combined with psychological support (Psi-PS) in military veterans and first responders with both alcohol use disorder (AUD) and post-traumatic stress disorder (PTSD).
Randomized, double-blind, placebo-controlled Phase II trial (n≈40) testing a single 25 mg oral dose of psilocybin (PEX010) plus nondirective psychological support versus inert placebo with identical psychological support in veterans and first responders with co-occurring AUD and PTSD.
Intervention includes two 60-minute telehealth preparation sessions, one 6–8 hour drug administration session with two facilitators present, and three 60-minute telehealth integration sessions; placebo recipients are offered open-label psilocybin at 4 weeks.
Primary objective is to characterise safety during the drug administration session and in follow-up to 24 weeks; secondary and exploratory measures assess subjective experience and clinical outcomes at multiple post-DAS timepoints.
25 mg oral psilocybin (PEX010) with nondirective psychological support: two 60‑minute prep sessions, one 6–8 hour drug administration session, and three 60‑minute integration sessions.
PEX010 capsule, single DAS
25 mg maltodextrin inert placebo with nondirective psychological support and same visit schedule as active arm.
Maltodextrin 25 mg inert placebo (PCB2)