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Completed Phase 3 Interventional Results available

A Study of Safety and Efficacy of Pimavanserin (ACP-103) in Patients With Parkinson's Disease Psychosis

ClinicalTrials.gov ID: NCT00658567

Public ClinicalTrials.gov record NCT00658567. 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 Nov 10, 2026, 1:23 AM EST

All trial information on this site comes from the official ClinicalTrials.gov public API (clinicaltrials.gov/api/v2), run by the U.S. National Library of Medicine. We only display that public information; we do not add opinions, endorsements, or any other intent. Always review the official ClinicalTrials.gov record for the latest information.

Brief summary

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

This study will evaluate the safety and efficacy of two dose levels of pimavanserin (ACP-103) compared to placebo in patients with Parkinson's disease psychosis.

Study identification

NCT ID
NCT00658567
Recruitment status
Completed
Study type
Interventional
Phase
Phase 3
Lead sponsor
ACADIA Pharmaceuticals Inc.
Industry
Enrollment
123 participants

Conditions and interventions

Eligibility (public fields only)

Age range
40 Years and older
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
Mar 2008 (Type not available)
Primary completion
Dec 2009 (Actual)
Completion
Dec 2009 (Actual)
Last update posted
May 19, 2017

2008 – 2009

United States locations

U.S. sites
26
U.S. states
14
U.S. cities
25
Facility City State ZIP Site status
Not listed La Habra California 90631 —
Not listed Laguna Hills California 92653 —
Not listed Reseda California — —
Not listed Ventura California 93003 —
Not listed Englewood Colorado 80113 —
Not listed Farmington Connecticut 06030 —
Not listed Deerfield Beach Florida 33064 —
Not listed Panama City Florida 32405 —
Not listed Sarasota Florida 34233 —
Not listed Boston Massachusetts 02215 —
Not listed Worcester Massachusetts 01655 —
Not listed Clinton Michigan 48035 —
Not listed Detroit Michigan 48201 —
Not listed East Lansing Michigan 48824 —
Not listed Columbia Missouri 65201 —
Not listed Omaha Nebraska 68131 —
Not listed Albany New York 12208 —
Not listed Commack New York 11725 —
Not listed Charlotte North Carolina 28204 —
Not listed Durham North Carolina 27705 —
Not listed New Bern North Carolina — —
Not listed Toledo Ohio 43614 —
Not listed Philadelphia Pennsylvania 19131 —
Not listed Philadelphia Pennsylvania 19141 —
Not listed Houston Texas 77030 —
Not listed Burlington Vermont 05401 —

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 24 non-U.S. sites.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT00658567, 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 May 19, 2017 · Synced Nov 10, 2026

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Open the official record

The complete public registry record, listed eligibility criteria, and available contact information for NCT00658567 live on ClinicalTrials.gov.

View official ClinicalTrials.gov record →