Skip to content
Study details
Enrolling now

Diphenhydramine for Sleep in Children with Autism

Stanford University
NCT IDNCT05501678ClinicalTrials.gov data as of Apr 2026
Phase

Phase 2

Target enrollment

26

Study length

about 4.4 years

Ages

8–17

Locations

1 site in CA

What this study is about

Researchers are testing if diphenhydramine helps children with autism sleep better. The trial will use a double-blind, placebo-controlled method to see how diphenhydramine affects sleep patterns and clinical measures over 8 weeks.

Simplified from trial records by PatientMatch.

What you may be asked to do

  • 1.Take Diphenhydramine
  • 2.Take Placebo

Participation Burden

What's physically and logistically required of participants.

Logistics & Travel
In-person visits

Requires travel to a study site

Physical Intervention
Standard

How treatment is administered

Treatment Assignment
Randomized & Blinded

You may get a placebo/standard care, and you won't know which.

Extracted study details

Pulled from the trial record to show what is being tested and what the study is measuring.

Drug classes

diphenhydramine

Endpoints

Primary: Change from baseline in duration of non-rapid eye movement (NREM) sleep as measured by polysomnography (PSG), Change from baseline in sleep latency as measured by polysomnography (PSG) and/or actigraphy

Secondary: Change from baseline in sleep efficiency as measured by polysomnography (PSG) and actigraphy

Body systems

Psychiatry / Mental Health