A Study of Esomeprazole in Children With Autism

Inclusion Criteria:

* outpatients 2 to 6 years of age;
* 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).