Study of Clozapine for the Treatment of Psychosis in Patients With Idiopathic Parkinson's Disease
clozapine
Synucleinopathies+13
+ Basal Ganglia Diseases
+ Brain Diseases
Treatment Study
Summary
Study start date: October 1, 1993
Actual date on which the first participant was enrolled.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
Protocol
This section provides details of the study plan, including how the study is designed and what the study is measuring.60 patients to be enrolled
Total number of participants that the clinical trial aims to recruit.Treatment Study
Eligibility
Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.Any sex
Biological sex of participants that are eligible to enroll.Healthy volunteers not allowed
If individuals who are healthy and do not have the condition being studied can participate.Conditions
Pathology
Criteria
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.)