Psilocybin and Methylenedioxymethamphetamine (MDMA) for Post-traumatic Stress Disorder (PTSD)

The proposed randomized, double-blind, active control study will compare a single experimental dose of co-administered MDMA + psilocybin (exact dosages not disclosed) with a single comparator dose of co-administered MDMA + psilocybin (exact dosages not disclosed). For the co-administered dosing session, MDMA will be given initially, followed by psilocybin 30 minutes later. Approximately 1.5 months after the first dosing session, a second single-blind (participant masked) dosing session will occur. The study will recruit adult Veterans with PTSD for ≥ 6 months.