We're building a better ClinicalTrials.gov. Check it out and tell us what you think!
ClinicalTrials.gov Menu

A Study of the Safety and Efficacy of Pimavanserin in Patients With Parkinson's Disease Psychosis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT01174004
Recruitment Status : Completed
First Posted : August 3, 2010
Results First Posted : March 26, 2014
Last Update Posted : March 26, 2014
Information provided by (Responsible Party):
ACADIA Pharmaceuticals Inc.

Brief Summary:
The purpose of this study is to evaluate the safety and efficacy of 40 mg pimavanserin compared to placebo in patients with Parkinson's disease psychosis (PDP).

Condition or disease Intervention/treatment Phase
Parkinson's Disease Psychosis Drug: pimavanserin tartrate Drug: placebo Phase 3

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 199 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Multi-Center, Placebo-Controlled, Double-Blind Trial to Examine the Safety and Efficacy of Pimavanserin in the Treatment of Psychosis in Parkinson's Disease
Study Start Date : July 2010
Actual Primary Completion Date : November 2012
Actual Study Completion Date : November 2012

Arm Intervention/treatment
Experimental: 1
pimavanserin tartrate, 40 mg, tablet, once daily by mouth for 6 weeks
Drug: pimavanserin tartrate
pimavanserin tartrate, 40 mg, tablet, once daily by mouth for 6 weeks
Other Name: ACP-103

Placebo Comparator: 2
placebo, tablet, once daily by mouth for 6 weeks
Drug: placebo
placebo, tablet, once daily by mouth for 6 weeks

Primary Outcome Measures :
  1. Antipsychotic Efficacy [ Time Frame: Each study visit (i.e. Days 1, 15, 29 and 43) ]

    Antipsychotic Efficacy was defined as a decrease in the severity and/or frequency of hallucinations and/or delusions. This is measured as the change from baseline (Day 1) to Day 43 in the Scale for the Assessment of Positive Symptoms 9-item sum score for Parkinson's Disease (SAPS-PD). The possible total score is 0 to 45 and a negative change in score indicates improvement.

    Analysis Method: Mixed Model Repeated Measures (MMRM)

Secondary Outcome Measures :
  1. Motor Symptoms Change From Baseline (Negative = Improvement) [ Time Frame: Study Days 1 and 43 ]

    Motor symptoms were measured using the change from baseline to Day 43 in the combined score of the Unified Parkinson's Disease Rating Scale (UPDRS) Part II (Activities of Daily Living) and Part III (Motor Examination). The possible total score is 0 to 160 and a negative change in score indicates improvement.

    Analysis Method: Analysis of Covariance (ANCOVA). The UPDRS Parts II+III score was analyzed by constructing 2-sided 95% confidence intervals (CIs) on the difference between the pimavanserin dose group and placebo mean change from baseline. Non-inferiority was concluded if the upper limit of the CI was less than or equal to 5.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   40 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • A clinical diagnosis of Parkinson's disease with a minimum duration of 1 year
  • Presence of visual and/or auditory hallucinations, and/or delusions, occurring during the four weeks prior to study screening
  • Psychotic symptoms must have developed after Parkinson's disease diagnosis was established
  • Subjects that are on anti-Parkinson's medication must be on a stable dose for 1 month prior to Study Day 1 (Baseline) and during the trial
  • Subject that has received stereotaxic surgery for subthalamic nucleus deep brain stimulation must be at least 6 months post surgery and the stimulator settings must have been stable for at least 1 month prior to Study Day 1 (Baseline) and must remain stable during the trial
  • The subject is willing and able to provide consent
  • Caregiver is willing and able to accompany the subject to all visits
  • Subject and caregiver are willing and able to adequately communicate in English for the purposes of the primary assessment

Exclusion Criteria:

  • Subject has a history of significant psychotic disorders prior to or concomitantly with the diagnosis of Parkinson's disease including, but not limited to, schizophrenia or bipolar disorder
  • Subject has received previous ablative stereotaxic surgery (i.e., pallidotomy and thalamotomy) to treat Parkinson's disease
  • Subject has current evidence of a serious and or unstable cardiovascular, respiratory, gastrointestinal, renal, hematologic or other medical disorder
  • Subject has had a myocardial infarction in last six months
  • Subject has any surgery planned during the screening, treatment or follow-up periods

Patients will be evaluated at screening to ensure that all criteria for study participation are met. These evaluations will include specific measures of psychosis severity, delirium, dementia, cardiovascular condition, and pregnancy status. Patients may be excluded from the study based on these assessments (and specifically if it is determined that their baseline health and psychiatric condition do not meet all protocol-specified entry criteria).

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01174004

Show Show 63 study locations
Sponsors and Collaborators
ACADIA Pharmaceuticals Inc.
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Layout table for additonal information
Responsible Party: ACADIA Pharmaceuticals Inc.
ClinicalTrials.gov Identifier: NCT01174004    
Other Study ID Numbers: ACP-103-020
First Posted: August 3, 2010    Key Record Dates
Results First Posted: March 26, 2014
Last Update Posted: March 26, 2014
Last Verified: February 2014
Additional relevant MeSH terms:
Layout table for MeSH terms
Parkinson Disease
Psychotic Disorders
Mental Disorders
Parkinsonian Disorders
Basal Ganglia Diseases
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Movement Disorders
Neurodegenerative Diseases
Schizophrenia Spectrum and Other Psychotic Disorders
Antiparkinson Agents
Anti-Dyskinesia Agents
Antipsychotic Agents
Tranquilizing Agents
Central Nervous System Depressants
Physiological Effects of Drugs
Psychotropic Drugs
Serotonin 5-HT2 Receptor Antagonists
Serotonin Antagonists
Serotonin Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action