Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Cannabis: early-phase trial registry
9 of 25 indexed Cannabis trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #652 of 28,707 conditions by registered trial count.
25 US clinical trials · 9 currently recruiting · #652 of 28,707 conditions by registered trial count
Cannabis: 25 US clinical trials tracked, 9 recruiting.
Cannabis is the subject of 25 registered US clinical trials on ClinicalTrials.gov, 9 of them currently open to new participants. 0 are in Phase 3-4 (later-stage) and 15 in Phase 1-2 (earlier-stage). The most active sponsor is Yale University, running 8 of these trials.
Enrollment posture brief
Registry condition cannabis
OPEN 9 | RECR 36% | LATE 0 | EARLY 15 | RANK #652 | SPON 8
Volume-matched condition peers
Nearest open-share peer: Cytomegalovirus Infections (36% recruiting · 25 trials)
Cannabis lists 9 open slots (36% of 25 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Cannabis on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Cannabis is recruiting below its size-band peers.
9 of 25 indexed trials (36%) are open to enrollment, against a 39.7% average across 762 conditions with 20-99 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
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One sponsor concentrates Cannabis research.
Yale University accounts for 8 of 25 trials (32%). 15 distinct sponsors appear on at least one study for this condition label.
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Most Cannabis trials plan to enrol fewer than 100 people.
Median target enrolment is 48 among the 25 trials that report a genuine target (sentinel values excluded). 18 of those (72%) plan for fewer than 100 participants.
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Cannabis research is mostly interventional.
23 interventional and 2 observational studies make up this index (92% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
25 total, page 1 of 1
Cannabis' Impact on Alcohol Consumption
Brown University
NCT05389930
Cannabis, HIV and Mental Processing Systems
Washington University School of Medicine
NCT05430490
Modeling the Effects of Chronic Marijuana Use on Neuroinflammation and HIV-related Neuronal Injury
Wake Forest University Health Sciences
NCT04810858
Gender Related Differences in the Acute Effects of Delta-9-Tetrahydrocannabinol in Healthy Humans
Yale University
NCT02781519
Gender Related Differences in the Acute Effects of Delta-9-Tetrahydrocannabinol in Healthy Humans: Sub-Study II
Yale University
NCT04704271
Effects of Cannabidiol and Tetrahydrocannabinol on Microbiome and Neuroinflammation in HIV
University of California, San Diego
NCT05514899
Cannabis Observations on Brain Waves, Retrieval, and Attention: Experiment 3
L. Cinnamon Bidwell
NCT06669585
Understanding the Clinical Pharmacology of Marijuana-Tobacco Co-administration
University of California, San Francisco
NCT05999383
Gender Related Differences in the Acute Effects of Delta-9-Tetrahydrocannabinol in Healthy Humans: Sub-Study I
Yale University
NCT02811510
Cannabinoids, Learning, and Memory
Yale University
NCT02407808
Ethanol and Cannabinoid Effects on Simulated Driving and Related Cognition: Sub-Study II
Yale University
NCT02710097
Ethanol and Cannabinoid Effects on Simulated Driving and Related Cognition
Yale University
NCT02404688
Ethanol and Cannabinoid Effects on Simulated Driving and Related Cognition: Substudy III
Yale University
NCT02710331
Ethanol and Cannabinoid Effects on Simulated Driving and Related Cognition: Sub-Study I
Yale University
NCT02709954
THC Memory & Reward Learning Pilot
Hartford Hospital
NCT05116527
Intervening to Prevent Youth Access to Marijuana Phase II
Klein Buendel
NCT03073291
Web-based vs In-person Personalized Feedback Intervention for Comorbid Substance Use and Disordered Gambling
University of Washington
NCT01529047
Efficacy of Inhaled Cannabis for Acute Migraine Treatment
University of California, San Diego
NCT04360044
Impact of Reduced Cannabis Use on Functional Outcomes (R33 Phase)
Duke University
NCT04567238
Pain Inflammation and Cannabis in HIV
Montefiore Medical Center
NCT05554146
Families With Substance Use and Psychosis: A Pilot Study
Mclean Hospital
NCT04284813
Impact of Reduced Cannabis Use on Functional Outcomes
Duke University
NCT03681353
Laboratory Smoking of Marijuana "Blunts"
Battelle Memorial Institute
NCT03546790
Effect of Cannabis and Endocannabinoids on HIV Neuropathic Pain
University of California, San Diego
NCT03099005
Feasibility Trial of rTMS for Cannabis Use Disorder
Medical University of South Carolina
NCT03538288
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 10 |
| Phase 2 | 5 |
Top Sponsors
Named interventions
Most-linked intervention names on Cannabis records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Cannabis trials. A trial with sites in several states counts in each.
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Related
What to do with this Cannabis page
25 registered trials, 9 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 9 Cannabis trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- Yale University sponsors the most Cannabis trials on record, review their full trial history before evaluating a specific study. See Yale University's trials
- Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide
Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Cannabis condition card totals 25 registered trials; most-linked intervention Placebo; top US site state Connecticut. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.