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

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.