Clinical trials
Drug Abuse clinical trials
Below are recruiting drug abuse clinical trials, each written for real people, not researchers. We’re tracking 39 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT05722561RecruitingPhase 2
E-cigarettes to reduce smoking in opioid use disorder
This Phase 2 study tests whether e-cigarettes can help people who use opioids (and also smoke cigarettes) cut down on combustible cigarette smoking. It looks at whether switching to e-cigarettes for “harm reduction” is safe and helps you smoke fewer cigarettes without requiring you to quit completely.
New York, New YorkAges 21–75 - NCT05707806Recruiting
Brain and decision tasks to study learning
This study tests how people learn from choices and make decisions using computer tasks. Some participants also complete brain scans (MRI) to see how the brain activity matches behavior.
Baltimore, MarylandAges 18–45 - NCT05630781Recruiting
Orexin's role in the neurobiology of addiction
This study looks at how a brain chemical called orexin affects addiction. Researchers will give a medication that blocks orexin to see if it helps reduce cravings or use. It might help people who smoke or vape regularly.
Baltimore, MarylandAges 18–60 - NCT05538910Recruiting
Brain imaging study on substance use and depression
This study uses brain scans to understand how substance use and mental illness, like depression, are linked. It may help develop better treatments by looking at brain activity in people with and without depression.
Baltimore, MarylandAges 18–60 - NCT02604277Recruiting
Study of suicidal behavior in people with bipolar disorder
This study looks at suicidal thoughts or behaviors in people diagnosed with bipolar disorder. It may help researchers understand what leads to suicidal risk and how to better support safety and treatment.
Atlanta, GeorgiaAges 18–64 - NCT03394066Recruiting
Magnetic brain stimulation safety and brain imaging study
This study tests how a non-invasive magnetic stimulation technique affects the brain in healthy volunteers. It involves MRI scans and aims to understand brain function without surgery.
Baltimore, MarylandAges 18–60 - NCT07812831Enrolling by invitation
How health information changes over time
This study looks at how health information from people changes over time. The goal is to better understand normal patterns and spot when things change, which may help doctors improve care. You can join whether you have a medical condition or are generally healthy.
New York, New YorkAges 18 years+ - NCT05776316Recruiting
Harm-reduction support for adults using opioids
This trial offers harm-reduction services for adults who have been misusing opioids (and sometimes other substances) recently. It’s designed to test support approaches that may reduce risks and improve well-being.
New Haven, ConnecticutAges 18 years+ - NCT06650267RecruitingPhase 2
Substance use and family violence treatment for fathers
This study tests a treatment program for fathers who have both a substance use disorder and a history of family violence within the last 18 months. The goal is to see if the program helps reduce substance misuse and improve family relationships.
New Haven, ConnecticutAges 18 years+ - NCT07559500RecruitingPhase 1
Study of tirzepatide for alcohol use disorder
This trial tests if tirzepatide, a diabetes drug, affects brain chemistry linked to alcohol use. Researchers want to see if it can help people with mild-to-moderate alcohol use disorder who also have tried stimulants.
Bethesda, MarylandAges 21–65 - NCT06880705Recruiting
Trans-Led Care Study for alcohol and drug support
This study is testing a program designed by and for transgender adults to help with alcohol or drug use problems. It looks at whether a supportive, community-based approach can improve health and well-being.
Chicago, IllinoisAges 18 years+ - NCT06651333Recruiting
Brain scans during opioid addiction treatment
This study uses brain scans to understand how methadone or buprenorphine treatment affects the brain, with the goal of helping people stay in treatment and avoid relapse. You would need to be recently started on one of these medications and be able to undergo MRI scans.
Hartford, ConnecticutAges 18–50 - NCT07813026RecruitingPhase 4
Combining gabapentin and oxycodone: abuse effects in recreational users
This study looks at how the combination of gabapentin and oxycodone affects feelings of reward or abuse (like euphoria) in healthy people who have used opioids recreationally. It helps understand if this combination might be more or less abusable.
Overland Park, KansasAges 18–55 - NCT05606562Recruiting
Free dental care during hospital treatment for drug abuse
This study offers free dental treatment to people who are staying in a hospital for drug abuse treatment. It aims to see how adding dental care can help while you’re getting help for substance use.
Narvik, NordlandAges 18 years+ - NCT03407079RecruitingPhase 2
Study of sucralose’s effects on digestion of drugs
This study tests whether the sugar substitute sucralose changes how your body absorbs and breaks down certain medicines. You’d take sucralose or a placebo for 4 weeks, visit the clinic, and complete required samples and medicine doses during visits.
Bethesda, MarylandAges 18–60
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Common questions
- Are there clinical trials for drug abuse?
- Yes. Clin2 currently lists 39 recruiting drug abuse studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a drug abuse trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a drug abuse trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.