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CompletedNCT01518309Updated Nov 23, 2020Results posted

An Open-label Safety Study of Pimavanserin in Parkinson's Disease Patients

A Phase 2 interventional study of pimavanserin tartrate (ACP-103) in Parkinson's Disease Psychosis, sponsored by ACADIA Pharmaceuticals Inc.. Completed at 1 site in United States. Per ClinicalTrials.gov, last updated 2020-11-23.

Sponsored by ACADIA Pharmaceuticals Inc. · Phase 2, Interventional, and Treatment

From the registry’s dates

  • Registered 4 years after the study started (first participant enrolled Nov 2004, registered Dec 2008).
Phase
Phase 2
Study type
Interventional
Enrollment
39
Allocation
Not applicable
Sex
All
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Study summary

This is an open-label extension study to assess the long-term safety and tolerability of pimavanserin (ACP-103) in subjects with Parkinson's Disease Psychosis (PDP).

02

Conditions studied

  • Parkinson's Disease Psychosis

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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 39 is close to 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.

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Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Patients of any age, male or female with a clinical diagnosis of idiopathic Parkinson's disease, who participated in a previous (Phase II) clinical trial that evaluated pimavanserin
  • Patients who may, in the opinion of the treating physician, benefit from continued therapy with pimavanserin
  • Patient is willing and able to provide consent

Exclusion criteria

Exclusion Criteria-

  • Female patient of childbearing potential
  • Patient has a clinically significant concurrent medical illness
  • Patient is judged by the treating physician to be inappropriate for the study.
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Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
39 participants (actual)

Study arms

  • Experimental
    pimavanserin tartrate (ACP-103)

    Tablets taken once daily by mouth at 20, 40, or 60 mg doses

    Drug: pimavanserin tartrate (ACP-103)

Interventions

  • Drugpimavanserin tartrate (ACP-103)

    Tablets taken once daily by mouth at 20, 40, or 60 mg doses

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What researchers measure

Primary outcomes

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

    Number (%) of patients with drug-related treatment-emergent AEs

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

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Results

Posted Nov 23, 2020

Participant flow

This was an open-label extension study, including patients with idiopathic Parkinson's Disease (PD) who had completed study ACP-103-006 (PD psychosis \[PDP\]) or study ACP-103-004 (PD with dyskinesias) and would benefit from continued pimavanserin treatment, as judged by the investigator.

Participant flow — Overall Study
MilestonePimavanserin
Started39
Completed0
Not completed39
Withdrew: Adverse event6
Withdrew: Death6
Withdrew: Lack of efficacy7
Withdrew: Withdrawal by subject6
Withdrew: Physician decision3
Withdrew: Sponsor decision2
Withdrew: Not in predefined categories9

Outcome measures

PrimaryNumber (%) of Patients With Drug-related Treatment-emergent Adverse Events (AEs)

Number (%) of patients with drug-related treatment-emergent AEs

Time frame:
From first to last study drug dose plus 30 days
Reported as:
Count of participants · Participants
Number (%) of Patients With Drug-related Treatment-emergent Adverse Events (AEs)
ParticipantsPimavanserin
Number (%) of Patients With Drug-related Treatment-emergent Adverse Events (AEs)17

Adverse events

Collected over Study treatment (median treatment duration: 475 days). Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Pimavanserin8/39 (20.5%)18/39 (46.2%)34/39 (87.2%)
Most frequent serious events
Showing 10 of 21
Most frequent serious events
EventPimavanserin
Myocardial infarctionCardiac disorders3/39
Hip fractureInjury, poisoning and procedural complications3/39
Subdural haematomaInjury, poisoning and procedural complications2/39
Parkinson's diseaseNervous system disorders2/39
Cardiac failureCardiac disorders1/39
DiarrhoeaGastrointestinal disorders1/39
Inguinal herniaGastrointestinal disorders1/39
PyrexiaGeneral disorders1/39
BronchitisInfections and infestations1/39
CellulitisInfections and infestations1/39
Most frequent other events
Showing 10 of 65
Most frequent other events
EventPimavanserin
ConstipationGastrointestinal disorders9/39
HallucinationPsychiatric disorders9/39
AnaemiaBlood and lymphatic system disorders8/39
Urinary tract infectionInfections and infestations8/39
FallInjury, poisoning and procedural complications7/39
Weight decreasedInvestigations7/39
Pain in extremityMusculoskeletal and connective tissue disorders6/39
Confusional stateNervous system disorders6/39
Oedema peripheralGeneral disorders5/39
Prothrombin time prolongedInvestigations5/39

Baseline characteristics

Age, Continuous
Age, Continuous(years)Pimavanserin
Mean71.9 ± 8.28
Sex: Female, Male
Sex: Female, Male(Participants)Pimavanserin
Female10
Male29
Race/Ethnicity, Customized
Race/Ethnicity, Customized(Participants)Pimavanserin
Caucasian38
Hispanic/Latino1
Region of Enrollment
Region of Enrollment(participants)Pimavanserin
United States39
Clinical Global Impression of Severity
Clinical Global Impression of Severity(Score on a scale)Pimavanserin
Mean3.6 ± 0.22
UPDRS tremor
UPDRS tremor(Score on a scale)Pimavanserin
Median1.0 (0 to 3)
UPDRS duration of dyskinesias
UPDRS duration of dyskinesias(Score on a scale)Pimavanserin
Median0.0 (0 to 3)
UPDRS disability of dyskinesias
UPDRS disability of dyskinesias(Score on a scale)Pimavanserin
Median0.0 (0 to 4)
08

Study locations

1 site
  • Danbury, Connecticut 06810, United States
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 23, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01518309
Lead sponsor
ACADIA Pharmaceuticals Inc.
Responsible party
Sponsor
First posted
Jan 26, 2012
Start date
Nov 17, 2004
Primary completion
May 2, 2013
Completion
May 2, 2013
Results posted
Nov 23, 2020
Last update
Nov 23, 2020

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 Oct 2020. You cannot join it, but the record below documents what was studied.

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