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Marijuana Use clinical trials

The registry lists 33 studies for Marijuana Use across 2 countries. 6 are recruiting or about to start. 19 of them are mainly about Marijuana Use (how this is decided). Per ClinicalTrials.gov, last updated 2026-10-06. Counting its narrower condition Marijuana Smoking too: 54 studies, 11 open.

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Status

Completed
25
Recruiting
4
Not yet recruiting
2
Status unknown
1
Suspended
1

Phase

Phase 2
5
Phase 1
2
Phase 3
2
Early Phase 1
1

Where

United States
24
Canada
4

Who runs them

New York State Psychiatric Institute (4) · Medical University of South Carolina (2) · University of Washington (2) · RAND (2) · McMaster University (1) · Friends Research Institute, Inc. (1) · Wayne State University (1) · Centre hospitalier de l'Université de Montréal (CHUM) (1)

What is being tested here

Drugs under test in Marijuana Use studies, those with the most open studies first. Medicines only given beside them are not counted. How drugs are counted

DrugOpenPhase 3All
Varenicline112
Cannabis sativa subsp. indica TOP003
Naltrexone002
Dronabinol001

Coming up

1phase 3 study under way
3studies finish main data collection within a year

Studies recruiting or running, from their records. “Main data collection” ends at the primary completion date, the sponsor’s own estimate, which often moves.

All 3

Who these studies take

Of the 4 Marijuana Use studies recruiting now, 1 (25%) set no upper age limit and 3 (75%) stop at 75 or younger. 1 (25%) take children under 18. 0 (0%) are for women only and 0 (0%) for men only; 2 (50%) take healthy volunteers.

Recruiting studies that take each age, of 4
AgeWomenMen
100 (0%)0 (0%)
183 (75%)3 (75%)
302 (50%)2 (50%)
402 (50%)2 (50%)
502 (50%)2 (50%)
652 (50%)2 (50%)
751 (25%)1 (25%)
851 (25%)1 (25%)

Across all 33 studies, recruiting or not: 76% stop at 75 or younger and 73% at 65; 24% take children; 3% are for women only and 0% for men only; 64% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Marijuana Use studies take

Of 17 interventional studies with no phase under Marijuana Use, half reached primary completion within 25 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Interventional, no phase25 mo14–35 · 17 studies——

Each figure is the month by which half the studies had reached primary completion, with the range in which the middle half did. Studies still running count until their last registry update; studies that stopped early are left out. Phase 1 includes early phase 1; observational means prospective or not stated, as retrospective and cross-sectional studies date a window of data rather than a study. How these figures are worked out

Studies

Recruiting first, then most recently updated. Showing 33 of 33. search them.