Extension Study of Pimavanserin in Irritability Associated With Autism Spectrum Disorder
Public ClinicalTrials.gov record NCT05555615. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A 52-Week Open-Label Extension Study of Pimavanserin in Children and Adolescents With Irritability Associated With Autism Spectrum Disorder (ASD)
Study identification
- NCT ID
- NCT05555615
- Recruitment status
- Terminated
- Study type
- Interventional
- Phase
- Phase 2, Phase 3
- Lead sponsor
- ACADIA Pharmaceuticals Inc.
- Industry
- Enrollment
- 209 participants
Conditions and interventions
Interventions
- Pimavanserin Drug
Drug
Eligibility (public fields only)
- Age range
- 5 Years to 18 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Nov 1, 2022
- Primary completion
- Feb 13, 2025
- Completion
- Feb 13, 2025
- Last update posted
- Dec 2, 2025
2022 – 2025
United States locations
- U.S. sites
- 18
- U.S. states
- 13
- U.S. cities
- 18
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Southwest Autism Research and Resource Center | Phoenix | Arizona | 85006 | — |
| Cortica Inc. (Glendale) | Glendale | California | 91361 | — |
| Cortica Inc. | San Rafael | California | 94903 | — |
| 1st Allergy and Clinical Research Group, d/b/a IMUNOe Research Centers | Centennial | Colorado | 80112 | — |
| Children's Research Institute | Washington D.C. | District of Columbia | 20010 | — |
| The EHS Medical Practice, PA, D/B/A Sarkis Clinical Trials | Gainesville | Florida | 32607 | — |
| APG Research, LLC | Orlando | Florida | 32803-3809 | — |
| AMR Baber Research Incorporated | Naperville | Illinois | 60563 | — |
| Clinical Research of Southern Nevada, LLC | Las Vegas | Nevada | 89128 | — |
| ERG Clinical Research - New York, PLLC DBA Richmond Behavioral Associates | Staten Island | New York | 10314 | — |
| Quest Therapeutics of Avon Lake dba Haidar Almhana Nieding LLC | Avon Lake | Ohio | 44012 | — |
| Cincinnati Children's Hospital Medical Center | Cincinnati | Ohio | 45229 | — |
| The Children's Hospital of Philadelphia | Philadelphia | Pennsylvania | 19146 | — |
| Medical University of South Carolina | Charleston | South Carolina | 29425 | — |
| Relaro Medical Trials, LLC | Dallas | Texas | 75243 | — |
| Red Oak Psychiatry Associates, PA | Houston | Texas | 77090 | — |
| AIM Trials, LLC | Plano | Texas | 75093 | — |
| Eastside Therapeutic Resource, Inc. dba Core Clinical Research | Everett | Washington | 98201 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 30 non-U.S. sites.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT05555615, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Dec 2, 2025 · Synced Jul 22, 2026
Related: full search, browse by condition, browse by drug or therapy, browse by sponsor, browse by U.S. city.
Open the official record
The complete protocol, eligibility criteria, and contact information for NCT05555615 live on ClinicalTrials.gov.