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Obsessive-Compulsive Disorder clinical trials

The registry lists 635 studies for Obsessive-Compulsive Disorder across more than 10 countries. 166 are recruiting or about to start. 526 of them are mainly about Obsessive-Compulsive Disorder (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-10. Counting its 3 narrower conditions too, such as Trichotillomania: 712 studies, 177 open.

ClinicalTrials.gov finds 759 studies for Obsessive-Compulsive Disorder. How that becomes 634 here

This page counts the studies the registry files under Obsessive-Compulsive Disorder, and those it files under no condition that list Obsessive-Compulsive Disorderthemselves. Each study its search finds is placed by how the registry filed it and by the conditions it lists. ClinicalTrials.gov counts as of Nov 8, 2026. How condition pages count

  1. 759Found by its condition searchIt reads the conditions a study lists and their synonyms, and also titles and keywords.
  2. −77Filed under a narrower condition, counted on its own pageTrichotillomania 41 · Hoarding Disorder 28 · Excoriation Disorder 8
  3. −4List Obsessive-Compulsive Disorder as a condition, but the registry did not file them under itMost often written as “Obsessive Compulsive Disorders” (3) and “Obsessive Compulsive Disorder OCD” (1). The registry filed them under other conditions only, most often Compulsive Personality Disorder (4) and Anxiety Disorders (2).
  4. −44Match it another way31 name it in the title and 13 by a synonym or other text the search reads.
  5. 634The count on this page7 of them list Obsessive-Compulsive Disorder in their own words; the registry filed them under no condition.

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Status

Completed
321
Recruiting
120
Status unknown
53
Active, not recruiting
38
Terminated
34
Not yet recruiting
32

Phase

Phase 2
94
Phase 4
36
Phase 1
34
Phase 3
31
Early Phase 1
4

Where

United States
299
Canada
52
China
51
Sweden
27
France
20
Brazil
17

Who runs them

Shanghai Mental Health Center (26) · New York State Psychiatric Institute (24) · Massachusetts General Hospital (23) · Karolinska Institutet (17) · National Institute of Mental Health (NIMH) (16) · Baylor College of Medicine (16) · University of South Florida (16) · Yale University (13)

What is being tested here

Drugs under test in Obsessive-Compulsive Disorder studies, those with the most open studies first. Medicines only given beside them are not counted. How drugs are counted

DrugOpenPhase 3All
Ketamine209
Psilocybin208
Fluvoxamine127
Fluoxetine104
Pramipexole103
Rituximab102
Valbenazine101
6-hydroxynorketamine101
Dextromethorphan101
N-Methyl-3,4-methylenedioxyamphetamine101

Drug classes tested here SSRIs 3 open · Psychedelics 3 open · SNRIs 1 open · Antipsychotics 9 · Antiemetics 5

Coming up

2phase 3 studies under way
63studies 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.

The 10 nearest

Who these studies take

Of the 120 Obsessive-Compulsive Disorder studies recruiting now, 31 (26%) set no upper age limit and 81 (68%) stop at 75 or younger. 28 (23%) take children under 18. 1 (1%) are for women only and 0 (0%) for men only; 18 (15%) take healthy volunteers.

Recruiting studies that take each age, of 120
AgeWomenMen
1020 (17%)20 (17%)
18103 (86%)102 (85%)
30102 (85%)101 (84%)
40102 (85%)101 (84%)
50101 (84%)100 (83%)
6580 (67%)79 (66%)
7543 (36%)42 (35%)
8535 (29%)34 (28%)

Across all 635 studies, recruiting or not: 76% stop at 75 or younger and 67% at 65; 26% take children; 1% are for women only and 0% for men only; 21% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Obsessive-Compulsive Disorder studies take

Of 13 phase 1 interventional studies under Obsessive-Compulsive Disorder, half reached primary completion within 30 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Phase 130 mo18–57 · 13 studies——
Interventional, no phase43 mo22–65 · 237 studies—43 mo22–65 · 234 studies
Observational68 mo41–84 · 27 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

Results posted1

Newly registered6

Show 1 more

Studies

Recruiting first, then most recently updated. Showing 50 of 635. Browse all 635 → or search them.