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Brain scans reveal sex differences in THC effects for cannabis users

NCT ID NCT07225777

Knowledge-focused Sponsor: Medical University of South Carolina 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
The trial has finished. Results may not be published yet.
Stopped early This study
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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Sep 09, 2026 · Updated 3 times

Summary

This study looks at how men and women with cannabis use disorder react differently to THC, the main psychoactive ingredient in cannabis. Researchers will give 40 adults either a THC pill or a placebo and use brain scans to measure changes in reward-related brain activity. The goal is to understand sex-specific brain responses, which could lead to more tailored treatments in the future.

What this could mean

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

Active substance
Dronabinol (synthetic THC)
What this could lead to
If it works, this could point toward personalized treatments for cannabis use disorder based on sex differences.
What could go wrong
This is a small early-phase study with only 40 participants, so results may not apply to everyone. It is designed to understand brain mechanisms, not to test a new 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

5 people

The number who actually took part.

Started

Apr 2026

Finished

Aug 2026

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 45 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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 21-45 * DSM-5 criteria for CUD * Cannabis use ≥4 days/week * THC-positive urine * BMI 18-30 * Regular menstrual cycle (females) * Willingness to use non-hormonal birth control (females) Exclusion Criteria: * Lifetime psychotic or bipolar disorder * Recent drug use other than cannabis * Current psychotropic medication * Treatment-seeking for SUD * Current psychiatric disorder (except mild alcohol, nicotine, or caffeine use disorder) * Pregnancy/nursing * MRI contraindications

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Conditions

The condition(s) this trial relates to.

cannabis dependence substance-related disorder

As listed by the trial registrant

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

Cannabis use disorder

Contacts and locations

Locations

  • Medical University of South Carolina

    Charleston, South Carolina, 29403, United States

More trials for these conditions

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