ClinicalTrials.gg
Sign In

Autism Spectrum Disorder clinical trials

The registry lists 1,726 studies for Autism Spectrum Disorder across more than 10 countries. 501 are recruiting or about to start. 1,090 of them are mainly about Autism Spectrum Disorder (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-12. Counting its 2 narrower conditions too, such as Autistic Disorder: 2,270 studies, 618 open.

ClinicalTrials.gov finds 2,325 studies for Autism Spectrum Disorder. How that becomes 1,724 here

This page counts the studies the registry files under Autism Spectrum Disorder, and those it files under no condition that list Autism Spectrum 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. 2,325Found by its condition searchIt reads the conditions a study lists and their synonyms, and also titles and keywords.
  2. −537Filed under a narrower condition, counted on its own pageAutistic Disorder 529 · Asperger Syndrome 7
  3. −4List Autism Spectrum Disorder as a condition, but the registry did not file them under itMost often written as “Autism Spectrum Disorder High-Functioning” (3) and “Autism-Spectrum Disorder” (1). The registry filed them under other conditions only, most often Child Development Disorders, Pervasive (1) and Conduct Disorder (1).
  4. −60Match it another way42 name it in the title, 2 in a keyword, and 16 by a synonym or other text the search reads.
  5. 1,724The count on this page9 of them list Autism Spectrum Disorder in their own words; the registry filed them under no condition.

Get an email when these change. Save the Autism Spectrum Disorder studies recruiting or about to start — once a week, free: studies that open, close, add sites or post results.

Watch these studies
See an example email

Example · made-up studies

Breast cancer · Recruiting: 2 came in, 3 changed

What changed in your saved searches, Oct 31 – Nov 6:

A study of drug A after surgery for early breast cancer

Came in · now Recruiting

Drug B with hormone therapy in advanced breast cancer

Changed

· Sites: 4 added, including Seoul and Busan

· Enrollment: 300 → 450 participants

Exercise during chemotherapy

Now Active, not recruiting

One email a week for all your saved searches. Stop any time.

Status

Completed
913
Recruiting
350
Status unknown
130
Not yet recruiting
122
Active, not recruiting
80
Terminated
61

Phase

Phase 2
181
Phase 1
66
Phase 3
52
Phase 4
23
Early Phase 1
15

Where

United States
773
France
110
Italy
89
China
86
Canada
70
Taiwan
61

Who runs them

National Taiwan University Hospital (42) · Stanford University (40) · Massachusetts General Hospital (37) · Riphah International University (30) · Yale University (24) · Istituto per la Ricerca e l'Innovazione Biomedica (22) · Holland Bloorview Kids Rehabilitation Hospital (22) · Children's Hospital Medical Center, Cincinnati (21)

What is being tested here

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

DrugOpenPhase 3All
Acetylcysteine325
Oxytocin2323
Leucovorin217
Xanomeline222
Trospium222
Arbaclofen138
Sulforaphane106
Cannabidiol105
Buspirone105
Propranolol103

Drug classes tested here SSRIs 2 open · Antipsychotics 1 open · Serotonin receptor agonists 1 open · Anxiolytics 1 open · Stimulants 1 open

Coming up

14phase 3 studies under way
172studies finish main data collection within a year3 of them phase 3

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, phase 3 first

Who these studies take

Of the 350 Autism Spectrum Disorder studies recruiting now, 48 (14%) set no upper age limit and 295 (84%) stop at 75 or younger. 298 (85%) take children under 18. 1 (<1%) are for women only and 5 (1%) for men only; 92 (26%) take healthy volunteers.

Recruiting studies that take each age, of 350
AgeWomenMen
10192 (55%)195 (56%)
18162 (46%)164 (47%)
30111 (32%)112 (32%)
4091 (26%)92 (26%)
5082 (23%)82 (23%)
6569 (20%)68 (19%)
7557 (16%)57 (16%)
8553 (15%)53 (15%)

Across all 1,726 studies, recruiting or not: 86% stop at 75 or younger and 84% at 65; 85% take children; 1% are for women only and 3% for men only; 28% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Autism Spectrum Disorder studies take

Of 82 phase 2 interventional studies under Autism Spectrum Disorder, half reached primary completion within 36 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Phase 119 mo14–27 · 35 studies——
Phase 236 mo23–52 · 82 studies—39 mo23–63 · 67 studies
Phase 333 mo25–38 · 18 studies——
Interventional, no phase25 mo12–47 · 824 studies—25 mo12–48 · 801 studies
Observational40 mo26–120 · 112 studies—47 mo27–120 · 98 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 recruiting7

Show 2 more

Results posted3

Newly registered18

Show 13 more

Studies

Recruiting first, then most recently updated. Showing 50 of 1,726. Browse all 1,726 → or search them.