Chronic PTSD

This is an open-label trial evaluating feasibility, tolerability, safety and efficacy of psilocybin assisted cognitive processing therapy for chronic Posttraumatic Stress Disorder (PTSD).

The purpose of this study is to identify how trauma-focused psychotherapy changes the function of brain circuitry in posttraumatic stress disorder (PTSD) and how this mediates improvements in the diminished ability to experience positive emotions following a traumatic or extremely stressful life event. In this instance, the investigators will be using cognitive processing therapy (CPT), a widely-utilized and evidence-based treatment for PTSD.