Glucose Regulation During Risperidone and Olanzapine Treatment

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00006195
Recruitment Status : Unknown
Verified December 2003 by National Center for Research Resources (NCRR).
Recruitment status was:  Recruiting
First Posted : September 8, 2000
Last Update Posted : October 12, 2006
Janssen, LP
Washington University School of Medicine
Information provided by:
National Center for Research Resources (NCRR)

Brief Summary:
The overall purpose of this research is to look at how two of the most commonly prescribed newer antipsychotic medications, risperidone and olanzapine, affect substances in the body such as glucose and insulin. Undesirable changes in blood sugar control, or glucose regulation, and type 2 diabetes can occur more commonly in individuals with schizophrenia compared to healthy subjects and subjects with other psychiatric conditions. While abnormalities in glucose regulation were first reported in schizophrenia before the introduction of antipsychotic medications, antipsychotic treatment may contribute significantly to abnormalities in glucose regulation. Attention to the way that antipsychotic medications may affect glucose regulation has increased as doctors have become more concerned in general about disease- and drug-related medical complications, including weight gain during antipsychotic treatment.

Condition or disease Intervention/treatment Phase
Schizophrenia Drug: risperidone Drug: olanzapine Not Applicable

Detailed Description:
This study will include 70 patients diagnosed with schizophrenia, taking either risperidone, olanzapine or haloperidol, and 20 healthy control subjects. Each subject will undergo a 4 hour glucose tolerance test. In addition, there will be a small project within the overall study to measure the effects of risperidone and olanzapine on glucose regulation as the individuals switch from their prior treatment with a conventional antipsychotic medication to either risperidone or olanzapine. Ten subjects will be studied on a typical neuroleptic at baseline then switched over a one week period to risperidone or olanzapine. The participants will be evaluated at 1 week, 4 weeks, and 12 weeks, prospectively. Each evaluation will consist of a 4 hour glucose tolerance test.

Study Type : Interventional  (Clinical Trial)
Masking: None (Open Label)
Primary Purpose: Treatment

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Schizophrenia
U.S. FDA Resources

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 60 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • meet DSM-IV criteria for schizophrenia, any type, or schizoaffective disorder;
  • able to give informed consent;
  • no medication changes for 2 weeks prior to and during the period of study;
  • currently taking olanzapine, risperidone, haloperidol or another typical antipsychotic

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00006195

Contact: John Newcomer, M.D. 1-314-362-2459

United States, Missouri
Washington University Recruiting
St. Louis, Missouri, United States, 63110
Contact: John Newcomer, M.D.         
Sponsors and Collaborators
National Center for Research Resources (NCRR)
Janssen, LP
Washington University School of Medicine Identifier: NCT00006195     History of Changes
Other Study ID Numbers: NCRR-M01RR00036-0752
M01RR000036 ( U.S. NIH Grant/Contract )
First Posted: September 8, 2000    Key Record Dates
Last Update Posted: October 12, 2006
Last Verified: December 2003

Additional relevant MeSH terms:
Schizophrenia Spectrum and Other Psychotic Disorders
Mental Disorders
Serotonin Antagonists
Serotonin Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Antipsychotic Agents
Tranquilizing Agents
Central Nervous System Depressants
Psychotropic Drugs
Dopamine Antagonists
Dopamine Agents
Autonomic Agents
Peripheral Nervous System Agents
Gastrointestinal Agents
Serotonin Uptake Inhibitors
Neurotransmitter Uptake Inhibitors
Membrane Transport Modulators