Effects of THC on alcohol consumption and brain reward mechanisms

Effects of THC on Alcohol Consumption and Neural Correlates of Reward

Phase 2 Interventional University of Colorado, Denver · NCT06446479

This study tests how taking a high dose of THC affects alcohol drinking and brain reward responses in people who use both substances.

Quick facts

PhasePhase 2
Study typeInterventional
Enrollment28 (estimated)
Ages21 Years to 40 Years
SexAll
SponsorUniversity of Colorado, Denver Academic / other
Locations1 site (Aurora, Colorado)
Trial IDNCT06446479 on ClinicalTrials.gov

What this trial studies

This study investigates how high doses of THC (20mg dronabinol) influence alcohol consumption and the neural correlates of reward in individuals who use both substances. Participants will undergo a screening assessment followed by two laboratory visits, where they will receive either THC or a placebo before engaging in alcohol consumption while undergoing MRI scans. The goal is to better understand the interaction between THC and alcohol and its effects on reward processing in the brain.

Who should consider this trial

Good fit: Ideal candidates are individuals who consume alcohol and use cannabis.

Not a fit: Patients who have contraindications for MRI or do not consume alcohol or cannabis may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide insights into how THC affects alcohol consumption, potentially leading to better treatment strategies for cannabis use disorder.

How similar studies have performed: While the interaction between THC and alcohol has been explored, this specific approach of using high doses of THC in a controlled laboratory setting is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Drink alcohol
* Use cannabis
* Contact site for additional details

Exclusion Criteria:

* MRI contraindications (implanted metal, weight \> 315 lb, etc.).
* Contact site for additional details

Where this trial is running

Aurora, Colorado

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Cannabis Use Disorder
Last reviewed 2026-06-13 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.