Psychotic Disorders & High Psychosis Risk
Current clinical consensus treats personal or strong family history of psychotic disorders as a major exclusion criterion for psilocybin therapy. Available evidence does not support benefit and highlights elevated risk of harm.
Last reviewed: 2026-07-24
Evidence narrative
Why this category is marked negative
Psilocybin can profoundly alter perception, belief stability, and self-boundaries. For people with schizophrenia-spectrum illness, bipolar disorder with psychotic features, or elevated psychosis vulnerability, those effects are more likely to destabilise than to heal.
What standards of care emphasise
- Modern trial protocols typically exclude psychotic disorders and often first-degree relatives with such histories.
- Safety guidelines prioritise preventing prolonged psychotic reactions and severe confusion.
- There is no robust evidence base supporting psilocybin as a treatment for primary psychotic illness.
How to read "negative" on PSILORIS
Negative means the balance of evidence and risk currently argues against therapeutic use for this indication, not that every related research question is forever closed. Any future exception would require specialised protocols far beyond general educational guidance.
Citations
[1] review · 2008
Human hallucinogen research: guidelines for safety
Johnson MW, Richards WA, Griffiths RR — Journal of Psychopharmacology
Foundational safety framework for human psychedelic research covering screening, set and setting, session monitoring, and aftercare.
DOI: 10.1177/0269881108093587
[2] review · 2018
Psychiatry & the psychedelic drugs. Past, present & future
Rucker JJH, Iliff J, Nutt DJ — Neuropharmacology
Reviews historical and contemporary psychiatric use of psychedelics, including safety considerations, study design challenges, and research priorities.
DOI: 10.1016/j.neuropharm.2017.12.040
Anecdotal reports
No curated anecdotes are attached to this condition yet.