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Does pot make you drink more? study investigates

NCT ID NCT02983773

Knowledge-focused Sponsor: Brown University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 smoking marijuana with different levels of THC affects alcohol cravings and drinking in people who are heavy drinkers and also use marijuana. 157 participants were given either a high-THC, moderate-THC, or placebo marijuana cigarette, then their alcohol cravings and drinking choices were measured. The goal was to understand the relationship between marijuana and alcohol use, not to test a treatment.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
THC (tetrahydrocannabinol) in smoked marijuana cigarettes
What this could lead to
If successful, this could help understand how marijuana use influences alcohol cravings and drinking behavior, potentially informing future treatments for co-use.
What could go wrong
This is a small, early-stage lab study with 157 participants, not designed to test a treatment. Results may not apply to real-world settings or to people seeking 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

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

157 people

The number who actually took part.

Started

Jan 2017

Finished

Jul 2021

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 44 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: * Age 21 to 44 * English-speaking * marijuana smoking in past month * report of current heavy episodic (binge) drinking * in good physical health and weighing \< 250 lbs * zero breath alcohol at each visit Exclusion Criteria: * history of seizures * smoking \>20 tobacco cigarettes per day * positive pregnancy test * nursing * positive urine toxicology screen for drugs other than cannabis * interest to quit or receive treatment for marijuana or alcohol use * meeting criteria for a current affective disorder (depression, or mania, panic disorder, and having psychotic symptoms as assessed by the SCID)

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Conditions

The condition(s) this trial relates to.

Alcohol Drinking cannabis dependence

As listed by the trial registrant

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

Alcohol drinking Marijuana

Contacts and locations

Locations

  • Brown University

    Providence, Rhode Island, 02912, United States

More trials for these conditions

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