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ClinicalTrials.gov 1 recruiting now official registry

Autism Spectrum Disorders clinical trials

Every US clinical trial registered for Autism Spectrum Disorders — phase mix, recruiting status, and the sponsors running them, straight from the NIH ClinicalTrials.gov registry.

21 US clinical trials · 1 currently recruiting

The research picture

Autism Spectrum Disorders has 21 registered US clinical trials, 1 of them open to new participants right now — about 5% of the total.

1
recruiting participants now
5%
of trials open to enrollment
0
in Phase 3–4 (later-stage)
3
top sponsor: Massachusetts General Hospital

Counts reflect the public ClinicalTrials.gov registry as last mirrored by PlainTrial. Status and phase are reported by each study's sponsor. This is reference information, not medical advice.

Active & Recent Trials

RECRUITING NA 108 participants

Water Competency Intervention in Autism

Ohio State University

NCT07076264

ACTIVE NOT RECRUITING 1,500 participants

Phenotypic and Genetic Factors in Autism Spectrum Disorders

Boston Children's Hospital

NCT00910559

ACTIVE NOT RECRUITING NA 200 participants

Project AFECT (Autism Family Empowerment Coaching and Training Program)

Stanford University

NCT05910502

COMPLETED Phase 2 479 participants

Withdrawal Study of Memantine in Pediatric Patients With Autism, Asperger's Disorder, or Pervasive Developmental Disorder Not Otherwise Specified Previously Treated With Memantine

Forest Laboratories

NCT01592747

COMPLETED NA 305 participants

Screening and Linkage to Services for Autism

University of Colorado, Denver

NCT02374541

COMPLETED NA 214 participants

Psychotherapy for Anxiety in Children With Autism Spectrum Disorder

University of South Florida

NCT02028247

COMPLETED 131 participants

Understanding Gastrointestinal Conditions in Children With Autism Spectrum Disorder (ASD)

Massachusetts General Hospital

NCT01675414

COMPLETED NA 80 participants

Improving Services and Outcomes for Children With Autism Spectrum Disorder (ASD)

Hugo W. Moser Research Institute at Kennedy Krieger

NCT01800539

COMPLETED Phase 2 68 participants

The Role of Vasopressin in the Social Deficits of Autism

Stanford University

NCT01962870

COMPLETED Phase 2 57 participants

Omega-3 Fatty Acids for Hyperactivity Treatment in Autism Spectrum Disorder

Hugo W. Moser Research Institute at Kennedy Krieger

NCT01694667

COMPLETED NA 40 participants

Pivotal Response Treatment for Children With Autism Spectrum Disorders

Yale University

NCT01908686

COMPLETED Phase 1 38 participants

Brain Imaging Study of Adults With Autism Spectrum Disorders

National Institute of Mental Health (NIMH)

NCT01093768

COMPLETED NA 36 participants

Syracuse University Fit Families Program: Autism

Syracuse University

NCT02940899

COMPLETED 26 participants

Autism Spectrum Disorders (ASD) Characterization Study

Massachusetts General Hospital

NCT00801554

COMPLETED NA 18 participants

Telehealth Coaching for Families of Children With Autism

University of Kansas Medical Center

NCT02928068

COMPLETED Phase 2 14 participants

Acamprosate in Youth With Fragile X Syndrome

Indiana University

NCT01300923

COMPLETED Early Phase 1 13 participants

Probiotics for Quality of Life in Autism Spectrum Disorders

Ohio State University

NCT02903030

COMPLETED NA 10 participants

Virtual Reality Social Cognition Training for Adults With Autism Spectrum Disorders

Yale University

NCT02139514

COMPLETED Phase 1 10 participants

University of California, San Diego (UCSD) Suramin Autism Treatment-1 (SAT1) Trial

University of California, San Diego

NCT02508259

COMPLETED Early Phase 1 8 participants

Pilot Study of Riluzole for Drug-Refractory Irritability in Autism Spectrum Disorders

Children's Hospital Medical Center, Cincinnati

NCT02081027

COMPLETED NA 8 participants

An Open-Label Trial of Oxytocin in Adolescents With Autism Spectrum Disorders

Massachusetts General Hospital

NCT01931033

Phase Distribution

PhaseTrial count
Phase 1 4
Phase 2 4

Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.

Reading the Autism Spectrum Disorders Trial Landscape

ClinicalTrials.gov lists 21 US studies indexed under Autism Spectrum Disorders, and 1 of those are currently open to recruitment — roughly 5% of the total volume on the registry. That ratio is a useful proxy for activity level: a high share of recruiting studies often signals that research interest is current and that new enrollment opportunities are appearing, while a low share typically means the field is dominated by completed or follow-up work where most participant spots have already been filled. These counts reflect the public registry only and include studies at every stage of design, so they should be read as an index of research attention rather than as a measure of treatment availability.

The phase distribution for Autism Spectrum Disorders shows 0 late-stage studies (Phase 3 and Phase 4 combined) alongside 8 earlier-phase entries (Phase 1 through Phase 2). Phase 1 and Phase 2 studies focus on early safety signals, dosing, and preliminary effect, while Phase 3 studies are typically the larger efficacy and safety trials submitted toward regulatory review, and Phase 4 studies follow approved interventions in real-world use. A condition weighted toward later phases often reflects a mature research pipeline with several interventions already close to or past approval, whereas a heavier early-phase tilt suggests the field is still exploring new mechanisms and candidate approaches.

Top sponsor activity for Autism Spectrum Disorders is led by Massachusetts General Hospital with 3 indexed trials, alongside 9 other organizations in the top contributor list. The list on this page surfaces up to 21 of the most relevant recent and active entries, ordered with recruiting studies first so practical options are visible. All figures are derived from the public ClinicalTrials.gov dataset maintained by the National Library of Medicine and are reproduced here for reference. Inclusion of a trial, sponsor, or intervention on this page is neither an endorsement nor a recommendation — eligibility, protocol changes, and site-level status can shift frequently, so always verify current details on ClinicalTrials.gov and consult a qualified healthcare provider before acting on anything you see here.

Frequently Asked Questions

How many clinical trials are there for Autism Spectrum Disorders?

PlainTrial tracks 21 US clinical trials for Autism Spectrum Disorders, of which 1 are currently recruiting participants. Data sourced from ClinicalTrials.gov.

How do I find a recruiting trial for Autism Spectrum Disorders?

Use the trial list above filtered by "Recruiting" status, or visit our trial finder at /recruiting to search by condition and state. Always discuss trial participation with your healthcare provider before enrolling.

Is this data current?

Data is sourced from ClinicalTrials.gov and reflects our most recent data pull. Trial status may have changed since then. Always verify current information at ClinicalTrials.gov before making decisions about participation.

Related

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from ClinicalTrials.gov (National Library of Medicine). Consult a qualified professional before making decisions based on this data.

Source: ClinicalTrials.gov (NIH/NLM) ClinicalTrials.gov AACT registry · 2026 Trial counts and statuses sourced from ClinicalTrials.gov. Sponsor counts include both industry and federal/academic sponsors.

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