Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 22 to 65

Using psilocybin with therapy to help reduce heavy drinking in people with alcohol use disorder

Official title: Mechanisms Supporting Psilocybin-assisted Psychotherapy for Alcohol Use Disorder: A Randomized, Controlled Clinical Trial

Run by University of Calgary · NCT05995769 · Data updated 2026-11-12

This study is testing if a single dose of psilocybin, along with therapy, can help people with alcohol use disorder drink less over 12 weeks.

Quick facts

PhasePhase 2
Study typeInterventional
Ages22 Years to 65 Years
SexAll
Enrollment128 (estimated)
SponsorUniversity of Calgary
Academic / other
Locations1 site (Calgary, Alberta)
StatusRecruiting
StartedMarch 20, 2024
Main results expectedOctober 1, 2027
Study endsOctober 1, 2027
Registry record updatedMay 7, 2024
Trial IDNCT05995769 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 22-65 with a moderate to severe diagnosis of alcohol use disorder who wish to reduce their alcohol consumption.

Probably not a fit

Patients with severe substance use disorders other than alcohol, or those with certain psychiatric conditions, may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study aims to evaluate the effectiveness of a single dose of psilocybin combined with motivational enhancement therapy (MET) in reducing heavy drinking among individuals diagnosed with alcohol use disorder (AUD). Participants will be randomly assigned to receive either a high dose of psilocybin or a low dose as a control, followed by five sessions of MET. The study will assess changes in heavy drinking days over a 12-week period using the Time Line Follow Back method. A total of 128 participants aged 22-65 will be recruited, and various clinical and neuroimaging measures will be taken to evaluate outcomes.

Why it matters

Potential benefit: If successful, this approach could provide a novel treatment option for individuals struggling with alcohol use disorder.

How similar studies have gone: Previous studies have shown promising results with psilocybin in treating various mental health conditions, suggesting potential success for this novel application.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Meets DSM-5 AUD criteria of at least moderate severity
* Meets heavy drinking requirements (heavy drinking days, number of drinks) in past 30 days
* Desire to decrease alcohol consumption
* Limited lifetime hallucinogen use

Exclusion Criteria:

* Severe or moderate substance use disorder other than alcohol or nicotine in past 6 months
* Diagnosis of schizophrenia, bipolar disorders or first-degree relative with diagnosis
* Active suicidal ideation or serious attempt within past 3 years
* Currently pregnant, nursing, or trying to become pregnant
* Any notable abnormality on ECG, physical exam, or routine medical blood laboratory test

Where it's running

  • University of Calgary
    Calgary, Alberta, Canada
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.