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Marijuana Abuse clinical trials

This page lists the studies that name Marijuana Abuse. ClinicalTrials.gov files more under this term, 561 on November 8, 2026, through its term mapping. Most others are about cannabis use itself, not problematic use.

The registry lists 188 studies for Marijuana Abuse across more than 10 countries. 26 are recruiting or about to start. 127 of them are mainly about Marijuana Abuse (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-10.

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Status

Completed
128
Status unknown
18
Recruiting
16
Not yet recruiting
10
Terminated
8
Withdrawn
5

Phase

Phase 2
63
Phase 1
24
Phase 3
14
Phase 4
12
Early Phase 1
9

Where

United States
128
Canada
13
Germany
7
France
6
Israel
5
Spain
3

Who runs them

Medical University of South Carolina (18) · New York State Psychiatric Institute (16) · National Institute on Drug Abuse (NIDA) (12) · Yale University (11) · Johns Hopkins University (6) · Wayne State University (6) · Aelis Farma (5) · Dartmouth-Hitchcock Medical Center (5)

Coming up

0phase 3 studies under way
7studies 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 7

Who these studies take

Of the 16 Marijuana Abuse studies recruiting now, 2 (13%) set no upper age limit and 13 (81%) stop at 75 or younger. 4 (25%) take children under 18. 0 (0%) are for women only and 1 (6%) for men only; 4 (25%) take healthy volunteers.

Recruiting studies that take each age, of 16
AgeWomenMen
100 (0%)0 (0%)
1813 (81%)14 (88%)
3012 (75%)13 (81%)
4010 (63%)11 (69%)
509 (56%)10 (63%)
656 (38%)6 (38%)
753 (19%)3 (19%)
852 (13%)2 (13%)

Across all 188 studies, recruiting or not: 82% stop at 75 or younger and 77% at 65; 20% take children; 4% are for women only and 3% for men only; 32% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Marijuana Abuse studies take

Of 11 phase 2 interventional studies under Marijuana Abuse, half reached primary completion within 31 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Phase 231 mo23–42 · 11 studies——
Interventional, no phase32 mo13–60 · 31 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

What changed recently

From the registry's own updates since Oct 13, 2026.

Started recruiting1

Newly registered4

Studies

Recruiting first, then most recently updated. Showing 50 of 188. Browse all 188 → or search them.