In accordance with
ORS 475A, the Oregon Psilocybin Advisory Board reviewed available medical, psychological, and scientific studies, research, and other information related to the safety and efficacy of psilocybin in treating mental health conditions. This rapid evidence review was published in July 2021 and was translated into Spanish in September 2021. Findings show that psilocybin, the active ingredient in psychedelic mushrooms, holds promise as an option to address mental health issues, and may be efficacious in reducing problematic alcohol and tobacco use. In February 2025, the Oregon Psilocybin Advisory Board (OPAB) recommended updating this document with additional references. The additional references have been added as an addendum, but not incorporated into the analysis.
The Oregon Psilocybin Advisory Board also acknowledged cultural and anthropological information regarding centuries of psilocybin use that was not included in the scientific literature review. A subsequent Cultural and Anthropological Review was published in November 2022, amplifying the cultural and anthropological information that scientific research may not address.
These publications can be found below and will be updated periodically by the Oregon Psilocybin Services section, in partnership with the Oregon Psilocybin Advisory Board.
Scientific Literature Review
The intent of this rapid review was to highlight particularly pertinent, high quality published scientific evidence, rather than provide an exhaustive systematic review of the published literature in accordance with ORS 475A.
The Rapid Evidence Review was published July 30, 2021. In February 2025, the Oregon Psilocybin Advisory Board (OPAB) recommended updating this document with additional references. The additional references have been added as an addendum, but not incorporated into the analysis. The 2025 OPAB members recommend that future OPAB members work to fully update the literature review.
Every effort has been made to provide links to references. When available, open access links were used. Many links require institutional or personal access to journals. If paid access is required, efforts were made to link to the abstract associated with the reference. Members of the public may be able to access the full version of these resources through academic or public libraries.