Risperidone and Olanzapine for the Schizophrenic Patients With Neuroleptic-Induced Acute Dystonia or Parkinsonism

This study has been completed.
Department of Health
Information provided by:
Taoyuan Mental Hospital
ClinicalTrials.gov Identifier:
First received: May 30, 2006
Last updated: NA
Last verified: February 2000
History: No changes posted

We initiate a study with research grant from department of health and Taoyuan mental hospital and choose risperidone and olanzapine as study medications. We compare the incidence of using anticholinergic drugs in schizophrenic patients of Han ethnics with neuroleptic-induced acute dystonia or parkinsonism to test the hypothesis that these two medications have different EPS incidence in EPS intolerant population.

Condition Intervention Phase
Extrapyramidal Syndrome
Drug: Risperidone and Olanzapine
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Single Blind
Primary Purpose: Treatment
Official Title: A Randomized Controlled Trial Study of Risperidone and Olanzapine for the Schizophrenic Patients With Neuroleptic-Induced Acute Dystonia or Parkinsonism

Resource links provided by NLM:

Further study details as provided by Taoyuan Mental Hospital:

Primary Outcome Measures:
  • Percentage of using concomitant anticholinergic drugs

Secondary Outcome Measures:
  • Scores of Rating Scale (Extrapyramidal System Rating Scale, Brief Psychiatric Rating Scale)

Estimated Enrollment: 70
Study Start Date: July 2000
Estimated Study Completion Date: July 2003
Detailed Description:

Objective: First generation antipsychotics frequently induced extrapyramidal side effects (EPS). Second generation antipsychotics were the choices for EPS intolerant schizophrenic patients. But which one of second generation antipsychotic was the better choice did not have definitive results. We compared risperidone and olanzapine in schizophrenic patients with acute dystonia or parkinsonism side effects and observed the incidence of needing concomitant anticholinergic drugs. We also collected the data of average dose of risperidone and olanzapine to help the dosing strategy guidelines for EPS intolerant schizophrenic patients.

Method: This randomized, rater-blind, parallel group, flexible dose study enrolled patients from Taoyuan Mental Hospital from July 2000 to July 2003. Schizophrenia (DSM-IV) patients who met the research criteria of neuroleptic-induced acute dystonia or parkinsonism research criteria of DSM-IV and greater than moderate severity (>4) of global impression of extrapyramidal syndrome rating scale (ESRS). 70 patients were random assignment to risperidone or olanzapine for 8 weeks. The primary outcome was to compare the incidence of concomitant anticholinergic drugs.


Ages Eligible for Study:   18 Years to 65 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Age of 18-65 y/o;
  • Female patients did not have pregnancy plans and must agree to use reliable pregnancy prevention methods if during childbearing age;
  • Meet schizophrenia criteria of DSM-IV;
  • Fulfill DSM-IV neuroleptic-induced acute dystonia or parkinsonism research criteria, the severity of acute dystonia or parkinsonism was greater than moderate degree (>4) assessed by global impression of Extrapyramidal System Rating Scale (item 43 and 44 of ESRS);
  • Patients or legal responsible people agree to join study and sign informed consent

Exclusion Criteria:

  • Had other axis I diagnosis of DSM-IV;
  • Unstable major systemic diseases;
  • Had neurological disorder influenced to EPS assessment;
  • Substance abuse or dependence other then coffee or tobacco within 6 months before study
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00331825

Taoyuan Mental Hospital
Taoyuan, Taiwan, 330
Sponsors and Collaborators
Taoyuan Mental Hospital
Department of Health
Study Chair: Hung-Yu Chan, M.D. Taoyuan Mental Hospital
  More Information

No publications provided

ClinicalTrials.gov Identifier: NCT00331825     History of Changes
Other Study ID Numbers: DOH-890010, TMH-91-01
Study First Received: May 30, 2006
Last Updated: May 30, 2006
Health Authority: Taiwan: Department of Health

Keywords provided by Taoyuan Mental Hospital:
Schizophrenia, EPS, risperidone, olanzapine

Additional relevant MeSH terms:
Parkinsonian Disorders
Basal Ganglia Diseases
Schizophrenia and Disorders with Psychotic Features
Mental Disorders
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Movement Disorders
Antipsychotic Agents
Serotonin Antagonists
Serotonin Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Pharmacologic Actions
Physiological Effects of Drugs
Tranquilizing Agents
Central Nervous System Depressants
Central Nervous System Agents
Therapeutic Uses
Psychotropic Drugs
Dopamine Antagonists
Dopamine Agents
Autonomic Agents
Peripheral Nervous System Agents
Gastrointestinal Agents
Serotonin Uptake Inhibitors

ClinicalTrials.gov processed this record on October 01, 2014