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Jess G. Fiedorowicz

4 papers in the library · 22 citations · publishing 2025-2026

Papers

Mortality risk among people receiving acute hospital care for hallucinogen use compared with the general population.

CMAJ March 2, 2025 Daniel T. Myran, Jennifer Xiao, Nicholas Fabiano et al. 8 citations

People who had an emergency department visit or hospital admission involving hallucinogen use in Ontario, Canada, between 2006 and 2022 had a 2.6-fold higher risk of death from any cause within five years compared with the general population. Among 7953 individuals with such acute care, 6.1% died within five years versus 0.6% in the matched general population. Elevated risks were also seen for death from unintentional drug poisoning, suicide, respiratory disease, and cancer. These associations persisted even after excluding people with other mental or substance use disorders.

Psilocybin Dispensaries and Online Health Claims in Canada

JAMA Network Open April 1, 2025 Jenna Matsukubo, Sarah Dickson, Jennifer Xiao et al. 7 citations

As of May 2024, 57 psilocybin dispensaries operated in Canada, located in 15 of 42 major cities (35.7%) and concentrated in Ontario and British Columbia. Most stores (61.4%) were part of a chain, 91.2% had an online presence, and all sold dried mushrooms, with many also offering microdosing capsules, chocolates, and gummies. 65.2% sold products mimicking popular food brands. Among stores with websites, 86.4% claimed mental health benefits such as alleviating anxiety, yet warnings about driving, pregnancy, or history of psychosis were rare (9.1%, 13.6%, and 31.8% respectively). The findings suggest a need for greater regulatory measures to protect the public.

Effect of psilocybin therapy on suicidal ideation, attempts, and deaths in people with psychiatric diagnoses: a systematic review and meta-analysis

Therapeutic Advances in Psychopharmacology September 1, 2025 Stanley Wong, Gray Meckling, Nicholas Fabiano et al. 6 citations

A systematic review and meta-analysis of nine randomized controlled trials involving 593 adults with psychiatric diagnoses found that psilocybin therapy led to a small but significant decrease in suicidal ideation compared to control conditions. No studies reported suicide attempts or deaths. The analysis showed low heterogeneity and no publication bias, though two studies had a high risk of bias. Current evidence is limited by small sample sizes, insufficient follow-up data, and inadequate assessment of blinding.

Psilocybin retail stores in Canada: Changes in availability, commercialization, and geographic distribution

Canadian Journal of Public Health March 19, 2026 Jenna Matsukubo, Erik Loewen Friesen, Rachael MacDonald-Spracklin et al. 1 citation

Between 2024 and 2025, the number of physical psilocybin retail stores in Canada increased from 57 to 75, a 33% rise in stores per 100,000 people (0.18 to 0.24). The proportion of Canadians living within a 10-minute walk of a store rose from 1.4% to 1.7%. However, 30 of the original 57 stores closed, while 48 new ones opened, indicating rapid turnover. Two large chains operated 44% of all stores in 2025, and 97% were located in Ontario and British Columbia. In Toronto and Vancouver, 9.5% and 29.0% of residents, respectively, lived within a 10-minute walk of a store. Most stores sold dried mushrooms, microdose capsules, and infused edibles online, with 69% offering products mimicking commercial snack brands.