Study of Clozapine for the Treatment of Psychosis in Patients With Idiopathic Parkinson's Disease

March 24, 2015 updated by: Memorial Hospital of Rhode Island

OBJECTIVES: I. Determine the efficacy and tolerability of clozapine in ameliorating psychosis in patients with idiopathic Parkinson's disease (PD).

II. Determine the adverse effects of clozapine on motor function in this patient population.

III. Determine the safety of clozapine in psychotic PD patients taking multiple anti-PD medications.

IV. Describe the phenomenology of drug induced psychosis in PD.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

PROTOCOL OUTLINE: This is a randomized, placebo controlled, double blind study, followed by an open label treatment of all patients. Patients are stratified according to the institutional investigator and age.

In the first phase of the study, patients receive either clozapine or placebo. The drug is taken orally at night, approximately 30 minutes before retiring. Therapy continues for 4 weeks unless psychosis becomes unmanageable without hospitalization, parkinsonism worsens, or other adverse effects occur. It is possible that the dose may be escalated.

In the second phase of the study, all patients are treated with open label clozapine. Therapy continues for 3 months unless psychiatric status or parkinsonism progress. Dose escalation is also possible during this phase.

Patients are followed weekly during the first phase of the study, and monthly during the second phase.

Completion date provided represents the completion date of the grant per OOPD records

Study Type

Interventional

Enrollment

60

Phase

  • Not Applicable

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

PROTOCOL ENTRY CRITERIA:

--Disease Characteristics-- Presumed idiopathic Parkinson's disease Presence of three of the cardinal features: Rest tremor Rigidity Bradykinesias/akinesia Postural and balance abnormalities Absence of alternative explanations for the syndrome Absence of atypical features Psychosis of at least 4 weeks duration requiring treatment --Prior/Concurrent Therapy-- Chemotherapy: No concurrent chemotherapy Other: No use of any dopamine blocking drug within the past 3 months No use of depot neuroleptic within the past 12 months No change of antidepressant or anxiolytic dose within the past 1 month No prior clozapine for psychosis Anti-PD medications stable for at least 7 days before study entry --Patient Characteristics-- Hematopoietic: No history of leukopenia No active blood dyscrasia other than mild anemia Renal: No active problems with urinary retention Cardiovascular: No symptomatic orthostatic hypotension No uncontrolled angina No myocardial infarction within the past 3 months Other: Fertile patients must use effective contraception No uncontrolled seizures (i.e., 1 or more seizures per month over the past 6 months) No dementia precluding accurate assessment on psychiatric assessment battery No AIDS No other illness that would make use of clozapine potentially hazardous No narrow angle glaucoma No systemic factor contributing to the psychosis (e.g., urinary infection, liver disease, renal failure, anemia, infection, etc.)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Masking: Double

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Memorial Hospital of Rhode Island

Investigators

  • Study Chair: Joseph H. Friedman, Memorial Hospital of Rhode Island

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

October 1, 1993

Study Completion

November 1, 1997

Study Registration Dates

First Submitted

February 24, 2000

First Submitted That Met QC Criteria

February 24, 2000

First Posted (Estimate)

February 25, 2000

Study Record Updates

Last Update Posted (Estimate)

March 25, 2015

Last Update Submitted That Met QC Criteria

March 24, 2015

Last Verified

May 1, 1998

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 199/13295
  • MHRI-FDR001416

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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