Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Marijuana: early-phase trial registry
A small indexed set (7 trials) with no open enrollment listed right now.
Corpus placement: #2,497 of 28,707 conditions by registered trial count.
7 US clinical trials · none currently recruiting · #2,497 of 28,707 conditions by registered trial count
Marijuana: 7 US clinical trials tracked, none currently recruiting.
Marijuana is the subject of 7 registered US clinical trials on ClinicalTrials.gov, none currently recruiting. 0 are in Phase 3-4 (later-stage) and 2 in Phase 1-2 (earlier-stage). The most active sponsor is Yale University, running 2 of these trials.
Enrollment posture brief
Registry condition marijuana
OPEN 0 | RECR 0% | LATE 0 | EARLY 2 | RANK #2497 | SPON 2
Volume-matched condition peers
Nearest open-share peer: Accelerated Phase Chronic Myelogenous Leukemia (0% recruiting · 12 trials)
Marijuana has no open enrollment in this registry pull (7 archived studies). Peers show how other volume-matched labels compare on open share. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Marijuana 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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Marijuana is recruiting below its size-band peers.
0 of 7 indexed trials (0%) are open to enrollment, against a 46.5% average across 27,806 conditions with fewer than 20 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
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One sponsor concentrates Marijuana research.
Yale University accounts for 2 of 7 trials (28.6%). 6 distinct sponsors appear on at least one study for this condition label.
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Most Marijuana trials plan to enrol fewer than 100 people.
Median target enrolment is 25 among the 7 trials that report a genuine target (sentinel values excluded). 5 of those (71.4%) plan for fewer than 100 participants.
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Marijuana research is mostly interventional.
6 interventional and 1 observational studies make up this index (85.7% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Indexed trials (enrollment closed)
7 total, page 1 of 1
Probing the Cannabinoid System in Individuals With a Family History of Psychosis
Yale University
NCT02102113
THC Memory & Reward Learning Pilot
Hartford Hospital
NCT05116527
Do Discounted Vouchers for Medical Cannabis Reduce Opioid Use in Adults With Pain
Vireo Health
NCT04495725
MEMO-Medical Marijuana and Opioids Study
Albert Einstein College of Medicine
NCT03268551
Families With Substance Use and Psychosis: A Pilot Study
Mclean Hospital
NCT04284813
Contingency Management for Cannabis Use for Persons With HIV
The University of Texas Health Science Center at San Antonio
NCT04866004
Brief Interventions With Text Messaging to Reduce Adolescent Alcohol and Marijuana Use
Yale University
NCT03401333
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 2 |
Top Sponsors
Named interventions
Most-linked intervention names on Marijuana records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Marijuana 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 Marijuana page
7 registered trials, 0 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- No Marijuana trials are currently recruiting in this registry; that can change as new trials post, or check the broader research index. Browse research indexes
- Yale University sponsors the most Marijuana 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 Marijuana condition card totals 7 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.