Examining how cannabis affects alcohol consumption

Is this trial a fit for you?

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

What this trial studies

This study investigates the effects of THC-dominant and CBD-dominant cannabis on alcohol consumption among heavy episodic drinkers who use cannabis weekly. Participants will engage in an alcohol choice task where they can choose to drink or receive monetary rewards for abstaining from alcohol. The study will enroll up to 350 participants, with a focus on understanding the impact of specific cannabinoids and the context of cannabis-alcohol co-use. Data will be collected through a combination of experimental sessions and a smartphone application over a four-week period.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Age 21 to 50
* English-speaking
* cannabis smoking in past two months
* heavy drinking in past two months
* in good physical health and weighing \< 250 lbs
* zero breath alcohol at each visit

Exclusion Criteria:

* positive pregnancy test
* nursing
* positive urine toxicology screen for drugs other than cannabis
* interest to quit or receive treatment for cannabis or alcohol use

Where it's running

• Brown University
  Providence, Rhode Island, United States Recruiting

Study contacts

• Principal investigator: Jane Metrik, PhD — Brown University
• Study coordinator: Jane Metrik, PhD
• Email: Jane_Metrik@brown.edu
• Phone: 401-863-6650

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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.