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Completed Phase 3 Interventional Results available

Relapse Prevention Study of Pimavanserin in Dementia-related Psychosis

ClinicalTrials.gov ID: NCT03325556

Public ClinicalTrials.gov record NCT03325556. 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.

ClinicalTrials.gov public records Last synced Oct 26, 2026, 12:10 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A Double-blind, Placebo-controlled, Relapse Prevention Study of Pimavanserin for the Treatment of Hallucinations and Delusions Associated With Dementia-related Psychosis

Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

The purpose of this study is to evaluate the efficacy of pimavanserin compared to placebo in preventing relapse of psychotic symptoms in subjects with dementia-related psychosis who responded to 12 weeks of open label pimavanserin treatment.

Study identification

NCT ID
NCT03325556
Recruitment status
Completed
Study type
Interventional
Phase
Phase 3
Lead sponsor
ACADIA Pharmaceuticals Inc.
Industry
Enrollment
392 participants

Conditions and interventions

Eligibility (public fields only)

Age range
50 Years to 90 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
Sep 27, 2017 (Actual)
Primary completion
Jul 31, 2019 (Actual)
Completion
Oct 30, 2019 (Actual)
Last update posted
Jun 21, 2021

2017 – 2019

United States locations

U.S. sites
27
U.S. states
13
U.S. cities
25
Facility City State ZIP Site status
ATP Clinical Research Inc. Costa Mesa California 92626 —
Neurology Center of North Orange County Fullerton California 92835 —
Visionary Investigators Network (Aventura Neurologic Associates) Aventura Florida 33180 —
Parkinson's Disease and Movement Disorders Center of Boca Raton Boca Raton Florida 33486 —
Premier Clinical Research Institute, Inc. Miami Florida 33122 —
Visionary Investigators Network (First Choice Neurology Group) Miami Florida 33176 —
Novel Clinical Research Center, LLC Miami Florida 33186 —
Collier Neurologic Specialists LLC Naples Florida 34102 —
Bioclinica Research Orlando Florida 32806 —
Neurology Associates of Ormond Beach Ormond Beach Florida 32174 —
Quantum Laboratories Pompano Beach Florida 33064 —
Neuroscience Research Institute Winfield Illinois 60190 —
University of Kansas Medical Center Research Institute, Inc. Kansas City Kansas 66160 —
Alzheimer Disease Center Quincy Massachusetts 02169 —
Clinical Research Professionals Chesterfield Missouri 63005 —
Millennium Psychiatric Associates, LLC; DBA Millennium Center for Clinical Research St Louis Missouri 63132 —
Neurology Center of Las Vegas Las Vegas Nevada 89128 —
Memory Enhancement Center of America, Inc. Eatontown New Jersey 07724 —
BioBehavioral Health Toms River New Jersey 08755 —
Neurological Associates of Albany, PC Albany New York 12208 —
Manhattan Behavioral Medicine, PLLC New York New York 10036 —
Richmond Behavioral Associates Staten Island New York 10312 —
Neuro-Behavioral Clinical Research, Inc. North Canton Ohio 44720 —
Thomas Jefferson University Philadelphia Pennsylvania 19107 —
Abington Neurological Associates Ltd. Willow Grove Pennsylvania 19090 —
University of Tennessee Medical Center Knoxville Tennessee 37920 —
University of Virginia Adult Neurology Charlottesville Virginia 22903 —

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 56 non-U.S. sites.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT03325556, 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 Jun 21, 2021 · Synced Oct 26, 2026

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Open the official record

The complete public registry record, listed eligibility criteria, and available contact information for NCT03325556 live on ClinicalTrials.gov.

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