Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 2 to 6

Esomeprazole for social communication problems in young children with autism

Official title: An Open-Label Pilot Study of Esomeprazole in Children With Autism

Run by Stanford University · NCT03866668 · Data updated 2026-11-12

This 12-week open-label study will try esomeprazole in children ages 2–6 with autism to see if it improves social communication.

Quick facts

PhasePhase 2
Study typeInterventional
Ages2 Years to 6 Years
SexAll
Enrollment25 (estimated)
SponsorStanford University
Academic / other
Locations1 site (Stanford, California)
StatusRecruiting
StartedMay 29, 2019
Main results expectedDecember 2028
Study endsDecember 2028
Registry record updatedNovember 5, 2026
Trial IDNCT03866668 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are outpatient children aged 2–6 with a confirmed ASD diagnosis, who are physically healthy, can swallow the medication, have stable concomitant medications, and have a caregiver able to attend clinic visits and provide reliable ratings.

Probably not a fit

Children with comorbid psychotic disorders, unstable seizures or other significant active medical illnesses, those who previously had an adequate trial of esomeprazole, or those unable to swallow the drug or who will change psychosocial treatments during the study are unlikely to benefit or be eligible.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This Phase 2, prospective, open-label trial will enroll about 25 children with autism spectrum disorder aged 2 to 6 years and treat them with esomeprazole for 12 weeks. Diagnosis must be confirmed by DSM-5 criteria and standardized tools such as the Autism Diagnostic Interview-Revised and the Autism Diagnostic Observation Schedule or CARS-2, and caregivers provide regular outcome ratings. Participants must be physically healthy, able to swallow the medication, on stable concomitant medications, and have no planned changes in psychosocial interventions during the trial. Clinical and caregiver-rated measures of social communication will be collected throughout the treatment period to look for changes from baseline.

Why it matters

Potential benefit: If successful, the intervention could improve social communication skills in some young children with ASD and offer a new medication option to complement behavioral therapies.

How similar studies have gone: Using a proton pump inhibitor like esomeprazole for core ASD social communication symptoms is a novel approach without robust prior clinical trial evidence of benefit.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* outpatients 2 to 6 years of age at time of consent;
* males and females who are physically healthy;
* diagnosis of autism spectrum disorder based on clinical evaluation and DSM-5 criteria, and confirmed using the Autism Diagnostic Interview-Revised, and the Autism Diagnostic Observation Schedule or Childhood Autism Rating Scale second edition (CARS-2)
* care provider who could reliably bring subject to clinic visits, could provide trustworthy ratings, and interacted with subject on a regular basis;
* ability of subject to swallow the compound;
* stable concomitant medications for at least 2 weeks (4 weeks if patient took fluoxetine);
* no planned changes in psychosocial interventions during the open-label trial.

Exclusion Criteria:

* DSM-5 diagnosis of schizophrenia, schizoaffective disorder, or psychotic disorder not otherwise specified;
* prior adequate trial of Esomeprazole;
* active medical problems such as unstable seizures, or significant physical illness (e.g., serious liver or renal pathology);
* recent or planned hospitalizations;
* history of hypersensitivity to benzimidazole;
* taking concomitant medications that interact with the study drug.

Where it's running

  • Stanford University School of Medicine
    Stanford, California, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.