a Pilot Study of Pramipexole to Treat Extrapyramidal Symptoms Induced by Antipsychotics

Study Overview
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Brief Summary
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This study is a pilot phased interventional clinical trial . The first stage will recruit 10 patients with antipsychotic induced extrapyramidal symptoms.The patients will take pramipexole for 8 weeks. The inital dose of pramipexole will be 0.375 mg/d, and the adjustment of drug dose will be depended on the the doctor's decision and patients' condition. The second stage was a randomized, rater blindness and Antan controlled clinical study. Researchers will recruit another 40 patients with extrapyramidal symptoms (tradive dyskinesia will be excluded). The patients will randomly be divided into artane group or pramipexole group, and the efficacy and safety condition of pramipexole and artane for different kinds of EPS will be compared. The pramipexole group will have 20 cases, and 20 cases of artane group. The dose of pramipexole group group range from 0.375mg/d to 0.75mg/d dose .The dose of artane range from 2 mg/d to 4 mg/d,.The accurate drug doses can be adjusted by the doctor according to the patients' condition . Researchers will evualate patients' symptom at baseline, after three days' of baseline, 2 weeks,4 weeks, 6 weeks and 8 weeks. The Simpson-Angus Scale(SAS) 、Barnes Akathisia Rating Scale（BARS）,Abnormal Involuntary Movement Scale (AIMS), Positive and Negative Syndrome Scale(PANSS), Calgary Depression Scale for Schizophrenia(CDSS), Clinical Global Impression-severity of Illness Scale(CGI-S) will be evualated by the trained raters indicated as the drug's efficacy of the extrapyramidal symptoms and schizophrenia .The adverse events, laboratory parameters, vital signs, ECG will be recorded as the safety indicators of the study drugs.

Official Title
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a Pilot Study of Pramipexole to Treat Extrapyramidal Symptoms Induced by Antipsychotics

Conditions
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Extrapyramidal Syndrome

Intervention / Treatment
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* Drug: Pramipexole
* Drug: Trihexyphenidyl hydrochloride


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age from 18-65 years old, male or female Subjects who met DSM-IV-TR criteria for extrapyramidal symptoms Scored 1 (mild) on at least two SAS items or 2 (moderate) on one of the items Exclusion Criteria are considered as antipsychotic induced parkinson ; Scored at least 2 (mild) on the BARS global item are considered as antipsychotic induced akathisia Written informed consent provided by legal guardians or patients Understand and voluntarily participate in this trail Exclusion Criteria: 1 A history of severe nervous system disease or nervous system injury 2 A history of severe or unstable heart, liver, kidney, endocrine (including thyroid function), hematological (such as those with hemorrhagic tendency) condition 3 Subjects who have an imminent risk of suicideor who can be a threat to himself others which judged by investigator 4 Substance or alcohol dependence at enrolment 5 Pregnancy or lactation or willing to pregnant during the trial 6 Low compliance to the doctor 7 Subjects who can't take drug in time according to doctors' advice 8 scored (mild) on at least two AIMS items or 3 (moderate) on one of the items are considered as tardive dyskesia Withdrawl Criteria An adverse sffecr or serious adverse effect occured so that the intervention needs to be stopped Subjects with poor compliance or who didn't take drugs for 4 days Obvious plan violation ,or the safety codition and symptoms of the patients are deteriorating scored (mild) on at least two AIMS items or 3 (moderate) on one of the items are considered as tardive dyskesia Researcher's decision of the withdrawl of the subjects -

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: pramipexole<br>pramipexole ,flexible dose (0.375mg/d-0.75mg/d) | Drug: Pramipexole<br>* The dose of pramipexole range from 0.375mg/d to 0.75mg/d , The accurate dose of pramipexole can be adjusted by the patient's condition and tolerance .<br>* Other names: SenForro;|
| Active Comparator: Antan<br>Antan,flexible dose (2-4mg/d) | Drug: Trihexyphenidyl hydrochloride<br>* he dose of Antan range from 2 mg/d to 4 mg/d , The accurate dose of pramipexole can be adjusted by the patient's condition and tolerance .<br>* Other names: Antan;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The change of SAS BARS AIMS from baseline | To compare the condition of the extrapyramidal symptoms between two groups | 8 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The change of PANSS CDSS CGI-S from baseline | To compare the change of the symptoms of chziophrenia between two groups | 8 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Extrapyramidal syndromes praminpexole pilot study