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Study reveals what happens when you mix booze and High-Potency weed

NCT ID NCT05999344

Knowledge-focused Sponsor: University of Colorado, Denver Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at how drinking alcohol and using high-THC cannabis concentrates together affects people. 146 heavy drinkers who also use cannabis regularly took part. Researchers measured things like blood alcohol level, heart rate, and how impaired they felt, depending on whether they drank first or used cannabis first. The goal was to understand how order and THC content change the experience, not to test a treatment.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

146 people

The number who actually took part.

Started

Dec 2021

Finished

Aug 2024

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

21 to 65 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. 21-65 years old, 2. Heavy drinkers (for men, \>4 drinks in one occasion, or \>14 drinks per week; for women, \>3 drinks in one occasion, or \>7 drinks per week) 3. Regular users of legal-market cannabis (at least 3x/week in past 3 months) 4. Have experience using cannabis concentrates within the last year 5. Willing to obtain a concentrate product of their choice for use in the study. Exclusion Criteria: 1. Diagnosed with or seeking treatment for alcohol use disorder (AUD) or other substance use disorder (SUD) 2. Pregnant, breastfeeding or trying to become pregnant 3. Meet criteria for psychotic, bipolar or major depressive disorder with suicidal ideation, or history of these disorders 4. Current use of psychotropic (except anti-depressants) or steroid medications 5. Report illicit drug use in past 60-days or fail drug screen (drug screen tests for the presence of amphetamines, benzodiazepines, cocaine, THC, methamphetamine and opioids; only THC is allowed to be present in urine in order to be eligible to participate in the study 6. Major medical condition contraindicating alcohol and/or cannabis consumption (e.g., liver disease, heart disease, or being told by a doctor that it is unsafe to consume alcohol or cannabis due to a medical condition) 7. Have participated in another research study in the past 8 weeks.

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Conditions

The condition(s) this trial relates to.

alcohol abuse cannabis dependence Psychomotor Disorders

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Alcohol use disorder Cannabis use

Contacts and locations

Locations

  • Colorado State University

    Fort Collins, Colorado, 80523, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.