Condition
Harmful Use clinical trials and research
As of November 12, 2026, Find a Trial lists 4 Harmful Use clinical trials that are recruiting, at sites in 3 countries (most in United States (2), Czechia (1), Norway (1)). Every study is explained in plain English. Data from ClinicalTrials.gov and NIH RePORTER, updated November 12, 2026.
- 4Clinical trials
- 3Countries
Newest Harmful Use clinical trials
| Study | Phase | Where | Status | Registered |
|---|---|---|---|---|
| Cannabis abstinence and thinking skills in 15–18-year-olds | — | Pilsen, Czechia | Recruiting | Sep 8, 2025 |
| How alcohol changes the social brain during paired interactions | — | Champaign, Illinois and 1 other locations | Recruiting | Aug 15, 2025 |
| Improving sleep to reduce alcohol use | — | Columbia, Missouri | Recruiting | Feb 29, 2024 |
| Exploring the health journeys of older adults with alcohol-related issues | — | Stavanger | Recruiting | Nov 15, 2019 |
All recruiting trials (4)
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Cannabis abstinence and thinking skills in 15–18-year-olds
We will test whether stopping cannabis use leads to improved thinking and memory in 15–18-year-olds with cannabis dependence or harmful use, with abstinence verified by urine tests.
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How alcohol changes the social brain during paired interactions
This study tests whether drinking alcohol changes brain activity and social bonding during conversations between pairs of regular social drinkers aged 21–30.
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Improving sleep to reduce alcohol use
This study is testing if treating insomnia can help people who drink heavily cut back on their alcohol use.
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Exploring the health journeys of older adults with alcohol-related issues
This study looks at how older adults over 60 with alcohol-related problems do after being hospitalized, to see if short treatments help them better than younger people.
Related topics
Quick answers
How many Harmful Use clinical trials are recruiting right now?
4, as of November 12, 2026. We update this list each time we refresh our data from ClinicalTrials.gov.
Where are these trials running?
In 3 countries. The most sites are in United States (2 trials), Czechia (1 trial), Norway (1 trial). Each study page lists its sites and which ones are recruiting.
How do I join one?
Open a study, check the "Is this trial a fit for you?" section, then contact the study team listed on the page. They will ask a few screening questions. Asking is free and does not commit you to anything. Talk it over with your doctor first.
Find the studies that fit you
A list is a starting point. Tell us your situation in your own words and we'll rank the studies that match and explain why. It's free and needs no account.