Clinical trials
Cannabis Smoking clinical trials
Below are recruiting cannabis smoking clinical trials, each written for real people, not researchers. We’re tracking 12 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT03909477Recruiting
Study of MRI brain scans in cannabis smokers over time
This study follows people who currently or used to smoke cannabis to see how cannabis use may change certain MRI scan signals in the brain over time. You may help researchers understand the effects of cannabis smoking and how brain imaging changes can be measured safely.
London, OntarioAges 18–85 - NCT07340554Recruiting
Brain imaging study for teens who use cannabis
This study looks at the brains of teenagers who use cannabis using an MRI scanner. It aims to understand how cannabis affects the developing brain, which might help improve treatment options.
Indianapolis, IndianaAges 14–17 - NCT05999383RecruitingPhase 2
Marijuana and tobacco use study
This trial looks at how marijuana and tobacco work together in your body. If you regularly use both cannabis and tobacco, you may help researchers understand their combined effects.
San Francisco, CaliforniaAges 21–65 - NCT02480283Recruiting
Study of cannabis smoke and lung immune response
This study compares people who smoke cannabis daily with people who have never used cannabis. It looks at how cannabis smoke affects lung stress and the lungs’ immune defenses, using health tests and urine screening to keep participants safe.
Aurora, ColoradoAges 18–55 - NCT07398443Recruiting
Study of marijuana and tobacco use in young adults
This study looks at how young adults use both marijuana and tobacco, and aims to understand their behaviors. It involves tasks and questionnaires, and may help develop better support for people who use both substances.
Providence, Rhode IslandAges 18–25 - NCT07679581Recruiting
Cannabis, brain waves, and attention study
This study looks at how cannabis use affects brain activity and attention. It compares heavy users and non-users to understand the effects on memory and focus.
Boulder, ColoradoAges 21–40 - NCT06588582Recruiting
How cannabis influences perception and feelings
This study looks at how smoking cannabis affects your perception and emotions. It aims to understand why some people use cannabis to cope with stress or negative feelings.
Boulder, ColoradoAges 21–65 - NCT07489443Recruiting
Helping pregnant women reduce tobacco and cannabis use
This study is testing a program to help pregnant women and new mothers cut back on or quit using tobacco and cannabis. It’s designed to see if the program is easy to use and helps improve health for both mom and baby.
Pittsburgh, PennsylvaniaAges 18 years+ - NCT05865470RecruitingPhase 1
How age affects smoked and oral THC effects
This early-stage study compares how people in different age groups respond to THC taken by smoking versus by mouth. It aims to understand age-related differences in effects and safety, which could help guide safer use in the future.
Los Angeles, CaliforniaAges 18–65 - NCT06609083RecruitingPhase 1
How cannabis affects cigarette smoking
This study looks at how cannabis affects cigarette smoking habits. If you smoke every day and also use cannabis weekly, researchers want to see if cannabis changes how much you smoke.
Baltimore, MarylandAges 21 years+ - NCT07167225Recruiting
E-cigarette and cannabis co-use in young adults
This study looks at how using e-cigarettes and cannabis together affects exposure to harmful chemicals in young adults aged 18-25. It aims to understand the risks of co-use to help guide healthier choices.
Buffalo, New YorkAges 18–25 - NCT07439471Recruiting
Study on tobacco and cannabis co-use in young adults
This study looks at why and how young adults use both tobacco and cannabis together. It may help understand patterns of use and improve future health programs.
Buffalo, New YorkAges 18–30
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Common questions
- Are there clinical trials for cannabis smoking?
- Yes. Clin2 currently lists 12 recruiting cannabis smoking 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 cannabis smoking 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 cannabis smoking 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.