Are there cannabis use clinical trials in California?

Yes. We're currently tracking 4 recruiting cannabis use studies with a site in California, each rewritten in plain language so you can see what it's testing and who it's for.

How do I find out if I qualify for a cannabis use study in California?

Each study lists its eligibility rules — age, diagnosis, prior treatments. On every trial page we explain these in plain language and offer a short, optional pre-screen for a fit read. The study team makes the final decision.

Do I have to live in California to take part?

Not necessarily. These studies have a site in California, but eligibility is about your health, not your address — some people travel to take part, and a few studies reimburse travel. The study team can tell you what's required.

Does it cost anything to join a cannabis use trial?

Using Clin2 is always free. Many trials cover the study treatment and related visits; some reimburse travel. The study team explains exactly what's covered before you decide.

Clinical trials · California

Cannabis Use clinical trials in California

We’re tracking 4 recruiting cannabis use studies with a site in California — including Early Phase 1 and Phase 2 studies, each written for real people, not researchers.

Recruiting studies in California

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
NCT07225738Recruiting
Multiple Myeloma treatment and cannabis use study
This study follows people with newly diagnosed multiple myeloma to see how their cancer treatments and use of medications, including cannabis, affect their health. It will help doctors learn more about what works best.
South Pasadena, CaliforniaAges 18 years+
NCT06699251Recruiting
Brief chat with your doctor about alcohol or cannabis for teens
This study tests whether a short, one-time conversation with a primary care provider can help teens who are at risk for alcohol or cannabis use. It's designed for young people ages 12–17 who get care at two specific health systems.
Commerce, CaliforniaAges 12–19
NCT04883255RecruitingEarly Phase 1
Study cannabis effects on brain function in adults with HIV
This early-phase study looks at how cannabis (and the body’s cannabinoid system) may affect thinking and brain-related measures in people with HIV. You may be asked to avoid cannabis and complete several brain and health assessments to see how these factors relate.
San Diego, CaliforniaAges 18–65

Where these studies are running in California

Institutions with a site for the recruiting cannabis use studies listed above.

AltaMed Health Services
City of Hope
City of Hope Comprehensive Cancer Center
City of Hope National Medical Center
City of Hope Newport Beach
City of Hope Orange County Lennar Foundation Cancer Center
City of Hope West Covina
UC San Diego Medical Center

What taking part in a cannabis use study involves

A screening visit first

Before anything else, the study team checks whether you fit — usually a visit with some tests. You can stop at any point, and screening is typically free.

Care at a nearby site

Study visits happen at a clinic or hospital taking part. Many studies cover the cost of the study treatment and related visits, and some reimburse travel.

You stay in control

Taking part is voluntary and you can leave a study at any time, for any reason, without affecting your regular care.

The team decides eligibility

Our fit check is a helpful first read, not a decision. The study team makes the final call after reviewing your health history.

Cannabis Use trials in other states

Common questions

Are there cannabis use clinical trials in California?: Yes. We're currently tracking 4 recruiting cannabis use studies with a site in California, each rewritten in plain language so you can see what it's testing and who it's for.
How do I find out if I qualify for a cannabis use study in California?: Each study lists its eligibility rules — age, diagnosis, prior treatments. On every trial page we explain these in plain language and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
Do I have to live in California to take part?: Not necessarily. These studies have a site in California, but eligibility is about your health, not your address — some people travel to take part, and a few studies reimburse travel. The study team can tell you what's required.
Does it cost anything to join a cannabis use trial?: Using Clin2 is always free. Many trials cover the study treatment and related visits; some reimburse travel. The study team explains exactly what's covered before you decide.

Not the right time?

New cannabis use studies open in California regularly. Set up a health profile and we’ll quietly watch for studies that fit you and email you when one opens.

Get told when a study that fits you opens

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.