CClinicalTrials.gg
CompletedNCT00550238Updated Jun 24, 2019Results posted

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

A Phase 3 interventional study of Pimavanserin tartrate (ACP-103) in Parkinson's Disease Psychosis, sponsored by ACADIA Pharmaceuticals Inc.. Completed at 135 sites in 14 countries. Open to participants aged 40 Years and older. Per ClinicalTrials.gov, last updated 2019-06-24.

Sponsored by ACADIA Pharmaceuticals Inc. · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
459
Allocation
Not applicable
Ages
40 Years and older
Sex
All
01

Study summary

To assess the long-term safety and tolerability of ACP-103 in subjects with Parkinson's disease psychosis.

Read the detailed description

This study did not have a fixed duration, and the duration of individual subject participation was determined based on investigator assessment of subject tolerability and continued benefit until such time as either the drug was commercially available in the US, or an alternate treatment extension was available in non-US regions. For this reason, no subjects, therefore, were considered to have "completed" the study.

02

Conditions studied

  • Parkinson's Disease Psychosis

Keywords

  • Parkinson's Disease Psychosis
03

In context

Parkinson Disease

4,487 studies on the registry are indexed under Parkinson Disease; 1,082 are open to participants now.

This study's enrollment of 459 is above the median of 40 across 3,294 interventional studies indexed under Parkinson Disease.

Browse Parkinson Disease studies →

Lead sponsor

ACADIA Pharmaceuticals Inc. is the lead sponsor of 41 studies on the registry; 5 are open to participants now.

Of its 25 completed or terminated interventional studies of FDA-regulated products, 23 (92%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
40 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Subject has completed the treatment period of a previous blinded study of pimavanserin
  • The subject is willing and able to provide consent
  • Caregiver is willing and able to accompany the subject to all visits

Exclusion criteria

Exclusion Criteria:

  • Subject has current evidence of a serious and or unstable cardiovascular, respiratory, gastrointestinal, renal, hematologic or other medical disorder
  • Subject is judged by the Investigator to be inappropriate for the study
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
459 participants (actual)

Study arms

  • Experimental
    Pimavanserin tartrate (ACP-103)

    Tablets taken once daily by mouth for as long as ACP-103 is considered to be tolerated and beneficial to subjects

    Drug: Pimavanserin tartrate (ACP-103)

Interventions

  • DrugPimavanserin tartrate (ACP-103)

    Tablets taken once daily by mouth for as long as ACP-103 is considered to be tolerated and beneficial to subjects

06

What researchers measure

Primary outcomes

  1. Safety: Number (%) of Patients With Drug-related Treatment-emergent Adverse Events (AEs)

    Number (%) of patients with drug-related treatment-emergent AEs (i.e. AEs reported by the Investigator as possibly, probably, or highly probably related to study drug)

    Time frame: From first to last study drug dose plus 30 days

07

Results

Posted Jun 24, 2019

Participant flow

Eligible patients were adult males or females with Parkinson's Disease Psychosis who had completed a prior double blind study with pimavanserin and were determined by the treating physician (Investigator) to benefit from continued treatment. This study did not have a fixed duration. Thus, no patients were considered to have "completed" the study.

Participant flow — Overall Study
MilestonePimavanserin
Started459
Completed0
Not completed459
Withdrew: Adverse event88
Withdrew: Death34
Withdrew: Disease progression46
Withdrew: Withdrawal by subject167
Withdrew: Physician decision31
Withdrew: Patient noncompliance25
Withdrew: Lost to follow-up13
Withdrew: Sponsor decision55

Outcome measures

PrimarySafety: Number (%) of Patients With Drug-related Treatment-emergent Adverse Events (AEs)

Number (%) of patients with drug-related treatment-emergent AEs (i.e. AEs reported by the Investigator as possibly, probably, or highly probably related to study drug)

Time frame:
From first to last study drug dose plus 30 days
Reported as:
Count of participants · Participants
Safety: Number (%) of Patients With Drug-related Treatment-emergent Adverse Events (AEs)
ParticipantsPimavanserin
Safety: Number (%) of Patients With Drug-related Treatment-emergent Adverse Events (AEs)180

Adverse events

Collected over From first to last study drug dose plus 30 days. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Pimavanserin59/459 (12.9%)188/459 (41%)328/459 (71.5%)
Most frequent serious events
Showing 10 of 184
Most frequent serious events
EventPimavanserin
PneumoniaInfections and infestations21/459
Urinary tract infectionInfections and infestations17/459
Pneumonia aspirationRespiratory, thoracic and mediastinal disorders11/459
Hip fractureInjury, poisoning and procedural complications10/459
Parkinson's diseaseNervous system disorders10/459
DehydrationMetabolism and nutrition disorders9/459
SyncopeNervous system disorders8/459
Pulmonary embolismRespiratory, thoracic and mediastinal disorders8/459
SepsisInfections and infestations7/459
DementiaNervous system disorders7/459
Most frequent other events
Showing 10 of 30
Most frequent other events
EventPimavanserin
FallInjury, poisoning and procedural complications145/459
Urinary tract infectionInfections and infestations79/459
HallucinationPsychiatric disorders62/459
Weight decreasedInvestigations57/459
Confusional statePsychiatric disorders50/459
ConstipationGastrointestinal disorders46/459
DysphagiaGastrointestinal disorders43/459
Oedema peripheralGeneral disorders43/459
DizzinessNervous system disorders43/459
AnxietyPsychiatric disorders41/459

Baseline characteristics

Enrolled patients who received at least 1 dose of study drug

Age, Continuous
Age, Continuous(years)Pimavanserin
Mean71.2 ± 8.19
Sex: Female, Male
Sex: Female, Male(Participants)Pimavanserin
Female176
Male283
Race/Ethnicity, Customized
Race/Ethnicity, Customized(Participants)Pimavanserin
White423
Black/African American4
Asian19
Other13
Region of Enrollment
Region of Enrollment(participants)Pimavanserin
North America321
Europe120
India18
08

Study locations

135 sites
  • Gilbert, Arizona 85234, United States
  • Phoenix, Arizona 85013, United States
  • Tucson, Arizona 84724, United States
  • Berkeley, California 94705, United States
  • Carson, California 90746, United States
  • Fountain Valley, California 92708, United States
  • Fresno, California 93720, United States
  • Irvine, California 92697, United States
  • La Habra, California 90631, United States
  • La Jolla, California 92037, United States
  • Laguna Hills, California 92653, United States
  • Loma Linda, California 92354, United States
  • Oxnard, California 93030, United States
  • Pasadena, California 91105, United States
  • Reseda, California 91335, United States
  • Sunnyvale, California 94085, United States
  • Ventura, California 93003, United States
  • Englewood, Colorado 80113, United States
  • Danbury, Connecticut 06810, United States
  • Fairfield, Connecticut 06824, United States
  • Farmington, Connecticut 06030, United States
  • Boca Raton, Florida 33486, United States
  • Bradenton, Florida 34205, United States
  • Deerfield Beach, Florida 33064, United States
  • Gainesville, Florida 32610, United States
  • Jacksonville, Florida 32209, United States
  • Miami, Florida 33136, United States
  • Naples, Florida 34102, United States
  • Orlando, Florida 32806, United States
  • Ormond Beach, Florida 32174, United States
  • Panama City, Florida 32405, United States
  • Pompano Beach, Florida 33060, United States
  • Port Charlotte, Florida 33980, United States
  • Saint Petersburg, Florida 33701, United States
  • Sarasota, Florida 34233, United States
  • Tampa, Florida 33606, United States
  • Augusta, Georgia 30912, United States
  • Decatur, Georgia 30033, United States
  • Glenview, Illinois 60026, United States
  • Springfield, Illinois 62794, United States
  • Kansas City, Kansas 66160, United States
  • Louisville, Kentucky 40202, United States
  • Scarborough, Maine 04074, United States
  • Baltimore, Maryland 21287, United States
  • Boston, Massachusetts 02215, United States
  • Worcester, Massachusetts 01655, United States
  • Clinton Township, Michigan 48037, United States
  • Detroit, Michigan 48201, United States
  • East Lansing, Michigan 48824, United States
  • Roseville, Michigan 48066, United States
  • Traverse City, Michigan 49684, United States
  • West Bloomfield, Michigan 48334, United States
  • Columbia, Missouri 65201, United States
  • Saint Louis, Missouri 63110, United States
  • Missoula, Montana 59802, United States
  • Toms River, New Jersey 08755, United States
  • Albany, New York 12208, United States
  • Commack, New York 11725, United States
  • Kingston, New York 12401, United States
  • Rochester, New York 14618, United States
  • Asheville, North Carolina 28806, United States
  • Charlotte, North Carolina 28204, United States
  • Durham, North Carolina 27705, United States
  • New Bern, North Carolina 28562, United States
  • Salisbury, North Carolina 28144, United States
  • Cincinnati, Ohio 45210, United States
  • Cleveland, Ohio 44195, United States
  • Columbus, Ohio 43210, United States
  • Toledo, Ohio 43614, United States
  • Greensburg, Pennsylvania 15601, United States
  • Philadelphia, Pennsylvania 19131, United States
  • Providence, Rhode Island 02906, United States
  • Brentwood, Tennessee 37027, United States
  • Houston, Texas 77030, United States
  • Salt Lake City, Utah 84108, United States
  • Burlington, Vermont 05401, United States
  • Alexandria, Virginia 22311, United States
  • Richmond, Virginia 23229, United States
  • Roanoke, Virginia 24018, United States
  • Virginia Beach, Virginia 23456, United States
  • Kirkland, Washington 98034, United States
  • Spokane, Washington 99204, United States
  • Milwaukee, Wisconsin 53233, United States
  • Innsbruck, 6020, Austria
  • Vienna, 1090, Austria
  • Roeselare, 8800, Belgium
  • London, Ontario N6A 5A5, Canada
  • Ottawa, Ontario K1G 4G3, Canada
  • Clermont Ferrand, 63003, France
  • Marseille, 13385, France
  • Nantes Cedex, 44093, France
  • Pessac, 33604, France
  • Strasbourg, 67091, France
  • Bangalore, 560 034, India
  • Chennai, 600 006, India
  • Hyderabad, 500003, India
  • Madurai, 625 020, India
  • Mangalore, 575 001, India
  • Mangalore, 575 002, India
  • Mumbai, 400 016, India

Showing the first 100 of 135 sites across 14 countries.

09

References and documents

Publications

  • Mathis MV, Muoio BM, Andreason P, Avila AM, Farchione T, Atrakchi A, Temple RJ. The US Food and Drug Administration's Perspective on the New Antipsychotic Pimavanserin. J Clin Psychiatry. 2017 Jun;78(6):e668-e673. doi: 10.4088/JCP.16r11119. PubMed 28493654 ↗
  • Ballard C, Isaacson S, Mills R, Williams H, Corbett A, Coate B, Pahwa R, Rascol O, Burn DJ. Impact of Current Antipsychotic Medications on Comparative Mortality and Adverse Events in People With Parkinson Disease Psychosis. J Am Med Dir Assoc. 2015 Oct 1;16(10):898.e1-7. doi: 10.1016/j.jamda.2015.06.021. Epub 2015 Aug 1. PubMed 26239690 ↗

Study documents

  • Study protocol · Jul 16, 2010
  • Statistical analysis plan · Aug 5, 2014

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 24, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT00550238
Lead sponsor
ACADIA Pharmaceuticals Inc.
Responsible party
Sponsor
First posted
Oct 29, 2007
Start date
Jul 2007
Primary completion
May 30, 2018
Completion
May 30, 2018
Results posted
Jun 24, 2019
Last update
Jun 24, 2019

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in May 2019. You cannot join it, but the record below documents what was studied.

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