Clinical trials · Colorado
Cannabis clinical trials in Colorado
We’re tracking 13 recruiting cannabis studies with a site in Colorado — including Phase 1, Phase 2 and Phase 3 studies, each written for real people, not researchers.
Recruiting studies in Colorado
- NCT06259916Recruiting
EEG to tell alcohol vs. cannabis intoxication
This study uses electroencephalography (EEG) to see if brain activity can tell whether you are drunk, high, or both. Results might help improve safety in the future.
Fort Collins, ColoradoAges 21–50 - 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 - NCT06107062RecruitingPhase 2
CBD treatment for cannabis concentrate users
This trial tests CBD as a potential treatment for heavy cannabis concentrate users who want to cut down or quit. You would take CBD daily and attend regular visits to track your progress.
Boulder, ColoradoAges 21 years+ - NCT06569394RecruitingPhase 2
Testing CBD in young adults who use cannabis heavily
This study tests whether cannabidiol (CBD) can help young adults who use cannabis heavily but aren't looking to quit. You'll take a CBD pill and see if it changes your cannabis use or related symptoms.
Aurora, ColoradoAges 18–25 - NCT06379971RecruitingPhase 1
Choline for cannabis use in pregnancy
This trial tests whether taking choline (a vitamin-like nutrient) during pregnancy can help protect the baby's brain development in women who use cannabis. It aims to understand if choline supplementation can reduce potential risks linked to cannabis use.
Aurora, ColoradoAges 18–45 - 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 - NCT06575751RecruitingPhase 2
Study of cannabidiol and cannabis concentrate users
This study looks at how cannabidiol (a compound in cannabis) affects people who regularly use strong cannabis concentrates like wax, shatter, or oil. It may help understand if using CBD can change how cannabis affects the body or help with cannabis use disorder.
Aurora, ColoradoAges 25–60 - 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 - NCT06446479RecruitingPhase 2
THC's effect on alcohol use and brain reward
This study tests whether THC (the active ingredient in cannabis) can change how much alcohol you drink and how your brain responds to rewards. You will have MRI scans and take THC or a placebo, then drink alcohol in a controlled setting.
Aurora, ColoradoAges 21–40 - NCT05052541RecruitingPhase 3
Oral cannabis for long-term spine pain
This trial studies whether taking cannabis by mouth can safely reduce chronic spine pain and improve daily comfort. You may be eligible if you have long-lasting spine pain and can follow study rules about stopping or limiting other cannabis and certain other treatments.
Aurora, ColoradoAges 21–84 - NCT06266611RecruitingPhase 2
Cannabis for cancer symptom relief
This trial tests whether cannabis can help cancer patients manage symptoms like sleep trouble, pain, and mood changes. It's for people who are new to using cannabis for these issues.
Aurora, ColoradoAges 25 years+ - NCT06290063RecruitingPhase 2
CBD for older adults who use cannabis
This study tests whether a pure CBD product (Epidiolex) can help older adults who use cannabis occasionally. It looks at how CBD affects people who already take medications for pain, sleep, or mood issues.
Boulder, ColoradoAges 60 years+ - NCT06235632Enrolling by invitation
Selling to intoxicated customers: a study for Oregon stores
This study tests ways to help marijuana and alcohol stores in Oregon sell responsibly to customers who may be intoxicated. If you work at a store, you can join to help improve safety practices.
Golden, ColoradoAges 21 years+
Cannabis trials by city in Colorado
Where these studies are running in Colorado
Institutions with a site for the recruiting cannabis studies listed above.
- University of Colorado Anschutz Medical Campus · 4 studies
- University of Colorado Boulder · 3 studies
- Anschutz Health Sciences Building
- Center for Innovation and Creativity (CINC)
- Colorado State University
- Klein Buendel, Inc.
- UCHealth
- UCHealth University of Colorado Hospital
What taking part in a cannabis 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 trials in other states
Common questions
- Are there cannabis clinical trials in Colorado?
- Yes. We're currently tracking 13 recruiting cannabis studies with a site in Colorado, 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 study in Colorado?
- 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 Colorado to take part?
- Not necessarily. These studies have a site in Colorado, 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 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 studies open in Colorado regularly. Set up a health profile and we’ll quietly watch for studies that fit you and email you when one 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.