Comparison of the Efficacy and Safety of Risperidone Versus Risperidone Plus Low Dose of Haloperidol in the Treatment of Schizophrenia

A Randomized, Double-Blind, Comparison of the Efficacy and Safety of Risperidone Versus Risperidone Combined With Low Dose of Haloperidol in the Treatment of Schizophrenic Disorder

The purpose of this study is to compare the efficacy and safety of risperidone and risperidone plus low dose of haloperidol in the acutely schizophrenic patients.

Study Overview

• Status: Terminated
• Conditions: Schizophrenia
• Intervention / Treatment: Drug: risperidone

Detailed Description

Antipsychotic monotherapy is recognized as the treatment of choice for patients with schizophrenia. Surveys have shown that antipsychotic drug combinations are frequently prescribed, yet few clinical studies have examined this practice. Risperidone, an atypical antipsychotics, has low incidence of extrapyramidal symptom (EPS) but with high cost compared to haloperidol. It has been reported that a relatively low daily dose of haloperidol at which individual patients develop slightly increase in EPS and has neurocognitive benefits as risperidone. The objective of the study is to compare the efficacy and safety of the fixed-dosed risperidone and risperidone combined with haloperidol in the treatment of acute psychotic exacerbations of schizophrenia.In this 6-week, double-blind, fixed-dose study, patients with schizophrenic disorder (DSM-IV diagnosis) are randomly assigned to risperidone (4 mg/d) or risperidone (2 mg/d) plus haloperidol (2 mg/d). The hypothesis is that the two treatment groups have the similar efficacy and safety, but different cost. The primary efficacy measure is change from baseline in Positive and Negative Syndrome Scale (PANSS) total scores; secondary outcomes include Clinical Global Impression-Change (CGI-C), the Calgary Depression Scale for Schizophrenics (CDSS), subject-reported outcomes via the Short Form-36 (SF-36), auditory evoked potentials (AEPs), and cognitive and social functioning. Safety assessments include the change from baseline on Simpson-Angus Rating Scale (SAS), Abnormal Involuntary Movement Scale (AIMS), Barnes Akathisia Scale (BAS), and UKU Side-effects Rating Scale (UKU), and the change from baseline in prolactin levels, body weight, AC glucose level, lipid panel (cholesterol, high density lipid protein [HDL], low density lipid protein [LDL], and triglyceride [TG])

• Study Type: Interventional
• Enrollment (Actual): 88
• Phase: Phase 4

Contacts and Locations

Study Locations

• Taiwan
  • Kaohsiung, Taiwan, 802
    • Kai-Suan Psychiatric Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 55 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Diagnosis of schizophrenia
• Clinical Global Impression large than 3
• Written informed consent

Exclusion Criteria:

• Comorbid of substance abuse/dependence
• Present or history of tardive dyskinesis or neuroleptic malignant syndromes
• Severe physical problems
• pregnant or lactating women

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Triple

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: HR; risperidone 2mg/d + haloperidol 2mg/d	Drug: risperidone; risperidone 4mg/d

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
change from baseline in Positive and Negative Syndrome Scale (PANSS) total scores	6 weeks after the initiation of antipsychotic use

Collaborators and Investigators

• Sponsor: Kaohsiung Kai-Suan Psychiatric Hospital
• Investigators: Study Director: Li-Shiu Chou, M.D., Kai-Suan Psychiatric Hospital

Publications and helpful links

General Publications

• Tapp A, Wood AE, Secrest L, Erdmann J, Cubberley L, Kilzieh N. Combination antipsychotic therapy in clinical practice. Psychiatr Serv. 2003 Jan;54(1):55-9. doi: 10.1176/appi.ps.54.1.55.
• Centorrino F, Goren JL, Hennen J, Salvatore P, Kelleher JP, Baldessarini RJ. Multiple versus single antipsychotic agents for hospitalized psychiatric patients: case-control study of risks versus benefits. Am J Psychiatry. 2004 Apr;161(4):700-6. doi: 10.1176/appi.ajp.161.4.700.
• Lehman AF, Lieberman JA, Dixon LB, McGlashan TH, Miller AL, Perkins DO, Kreyenbuhl J; American Psychiatric Association; Steering Committee on Practice Guidelines. Practice guideline for the treatment of patients with schizophrenia, second edition. Am J Psychiatry. 2004 Feb;161(2 Suppl):1-56. No abstract available.
• Woods SW. Chlorpromazine equivalent doses for the newer atypical antipsychotics. J Clin Psychiatry. 2003 Jun;64(6):663-7. doi: 10.4088/jcp.v64n0607.
• McEvoy JP, Hogarty GE, Steingard S. Optimal dose of neuroleptic in acute schizophrenia. A controlled study of the neuroleptic threshold and higher haloperidol dose. Arch Gen Psychiatry. 1991 Aug;48(8):739-45. doi: 10.1001/archpsyc.1991.01810320063009.

Study record dates

Study Major Dates

• Study Start: August 1, 2007
• Primary Completion (Actual): July 1, 2009
• Study Completion (Actual): October 1, 2009

Study Registration Dates

• First Submitted: October 8, 2009
• First Submitted That Met QC Criteria: October 18, 2009
• First Posted (Estimate): October 20, 2009

Study Record Updates

• Last Update Posted (Estimate): October 20, 2009
• Last Update Submitted That Met QC Criteria: October 18, 2009
• Last Verified: October 1, 2009

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Mental Disorders; Schizophrenia Spectrum and Other Psychotic Disorders; Schizophrenia; Physiological Effects of Drugs; Neurotransmitter Agents; Molecular Mechanisms of Pharmacological Action; Central Nervous System Depressants; Antipsychotic Agents; Tranquilizing Agents; Psychotropic Drugs; Serotonin Agents; Dopamine Agents; Serotonin Antagonists; Dopamine Antagonists; Risperidone
• Other Study ID Numbers: KSPH-2007-17