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Study identifier: NCT06225232 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

Psilocybin in the Treatment of Cannabis Use Disorder: A-Proof-of-Concept Study

Condition: Cannabis Use Disorder, Moderate · Cannabis Use Disorder, Severe  ·  Sponsor: McMaster University

PhasePhase 2
Planned participants16
Who can joinAll sexes, 18 Years to 65 Years
Healthy volunteersNo

About this study

Cannabis is the most commonly used psychoactive substance in Canada (Lowry \& Corsi, 2020). A sub-group of cannabis users develop a condition known as Cannabis Use Disorder (CUD), which is defined as a regular pattern of cannabis use that causes performance difficulty at work, school and relationships (Hasin et al., 2013). A review of current treatments available for CUD indicate the lack of a pharmacological and psychological treatment with high success rates, which highlights the importance of exploring potential psychosocial interventions for the treatment of CUD. Given the evidence of psilocybin's therapeutic potential in the treatment of substance use disorders (de Veen et al., 2017), we aim to conduct a study using psilocybin-assisted-psychotherapy in the treatment of CUD. The study aims to evaluate the feasibility, safety, tolerability and potential therapeutic effect of 2 doses \[25 mg\] of psilocybin administered as part of an 8-week Motivational Enhancement Therapy (MET) and supportive therapy. This trial will be the first to evaluate the potential treatment effects of psilocybin on symptoms of CUD.

This description comes directly from the study's public registry record.

Talk to the study team

Maryam Rahat, Ph.D Candiate  ·  905-921-7644  ·  Rahatvam@mcmaster.ca

Beth Patterson  ·  905-921-7644  ·  Bpatter@McMaster.ca

Always discuss trial participation with your own doctor first.

Locations (1)

MacAnxiety Research CentreHamilton, Ontario, CanadaRecruiting

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Source record: clinicaltrials.gov/study/NCT06225232