Level of Preparedness to Use Psilocybin Among Individuals Seeking Psychedelic Risk Reduction: A retrospective study of a pilot psychiatric consultation service
Harland V. Harrison, Maxence Gaillard, Ryan Cook, A. Sarparast, Ximena A. Levander
medRxiv August 19, 2026 preprint DOI: 10.64898/2026.08.17.26360633 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Retrospective chart review |
|---|---|
| Sample size | 29 |
| Population | Patients seeking care at an Oregon-based pilot consult service specializing in psilocybin risk reduction |
| Measures | Psychedelic Preparedness Scale (PPS) |
| Topics | Psilocybin |
| Key findings | Patients had high rates of trauma and prior psilocybin use, with most seeking psilocybin for psychiatric concerns. Preparedness scores averaged 91.3 and did not differ by insurance, motivation, or prior psychedelic use. |
Abstract
Introduction: In 2020, Oregon became the first US state to legalize state-regulated psilocybin services. This study aims to examine: 1) the clinical and demographic characteristics, 2) psilocybin use motivations, and 3) differences in preparedness among patients seeking care in a Oregon- based pilot consult service specializing in psilocybin risk reduction.
Methods: This retrospective chart review abstracted sociodemographics, trauma history, and medical and psychiatric risks of patients (November 2023 - September 2025). The Psychedelic Preparedness Scale (PPS), a validated self-report questionnaire, measured preparedness. Two sample t-tests examined associations of PPS scores by insurance, consult motivations, and prior psychedelic use.
Results: Patients (N=29) had a mean age of 47.14 years (SD=15.9), were majority female (55.2%); White (82.8%); and privately insured (62.1%). Patients mostly sought psilocybin to address only a psychiatric concern (75.9%); 27.6% anticipated naturalistic (non-state regulated) use. Most patients were deemed low risk for adverse events. Prevalence of prior challenging psychedelic experiences (CPE) was 17.2%; 58.6% reported lifetime psilocybin use. 86.2% endorsed >1 form of lifetime trauma. Of PPS completers (N=23, 79%), mean score was 91.3 (SD = 23.99). Scores did not significantly differ by insurance; consultation motivation; CPE; prior psilocybin or psychedelic use.
Conclusion: Patients utilizing a novel consultation service demonstrate a high prevalence of trauma, prior psilocybin use, and baseline preparedness. While preliminary, this is among the first descriptions of patients seeking medical and psychiatric consultation when considering psilocybin and highlight the potential role of healthcare systems in providing evidence-based patient education and risk reduction as interest in psychedelics grows.
Comparable studies
Other observational and cohort studies on psilocybin, most cited first.
| Study | Year | Design | Participants |
|---|---|---|---|
| Psilocybin for treatment-resistant depression: fMRI-measured brain mechanisms. Patients with treatment-resistant depression | 2017 | Observational cohort | n = 19 |
| Psychedelic effects of psilocybin correlate with serotonin 2A receptor occupancy and plasma psilocin levels Healthy volunteers | 2019 | Observational cohort | n = 8 |
| Increased spontaneous MEG signal diversity for psychoactive doses of ketamine, LSD and psilocybin Humans | 2017 | Observational study | |
| Classic psychedelic use is associated with reduced psychological distress and suicidality in the United States adult population. USA adult respondents from the National Survey on Drug Use and Health (2008-2012) | 2015 | Observational cohort | n = 190,000 |
| Prediction of Psilocybin Response in Healthy Volunteers Healthy volunteers | 2012 | Observational cohort | n = 409 |
Citations in the library
Cites 35
- Survey study of challenging experiences after ingesting psilocybin mushrooms: Acute and enduring positive and negative consequences Journal of Psychopharmacology August 31, 2016
- Predicting Responses to Psychedelics: A Prospective Study Frontiers in Pharmacology November 2, 2018
- Prediction of Psilocybin Response in Healthy Volunteers PLoS One February 17, 2012
- Classic Hallucinogens and Mystical Experiences: Phenomenology and Neural Correlates. Current Topics in Behavioral Neurosciences 2018
- Psychedelic Drug Legislative Reform and Legalization in the US JAMA Psychiatry December 7, 2022
and 30 more in the library