Group Retreat Psilocybin Therapy for People with Metastatic Cancer with Anxiety and Depression: A Rite of Passage Facilitation Model for a Phase 1/2 Study
Psychedelic Medicine December 23, 2025 Anthony L. Back, Bonnie A. Mcgregor, Lindsay Billingsley et al. 1 citation
A group facilitation model for psilocybin therapy, developed for an FDA-approved Phase 1 to 2 clinical trial, draws on anthropological studies of ritual, specifically rites of passage, to structure a secular retreat for people with metastatic cancer experiencing anxiety or depression. The model uses three phases: separation (preparation), liminal (psilocybin dosing session), and reincorporation (integration). Ritual functions psychologically to support emotional regulation and meaning-making, and communally to embed individual experience in shared intention and care. This is the first FDA-approved clinical trial of a secular ritual-based group facilitation model for psychedelic therapy with empirically demonstrated safety and efficacy outcomes.