Ziprasidone Versus Olanzapine In The Treatment Of Schizophrenia.

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: NCT00239109
Recruitment Status : Completed
First Posted : October 14, 2005
Last Update Posted : March 18, 2008
Information provided by:

Brief Summary:
  • Various studies suggest that patients treated with Olanzapine can experience a substantial weight gain, while no changes have been observed in patients treated with Ziprasidone. Negative consequences on lipid and glucose profiles have also been observed in patients treated with Olanzapine. Most of the available data belong to short-term studies. However, for most clinical trials the primary variable was an efficacy variable, and included the weight assessment as a secondary variable; they also lack a systematic monitoring of some variables that can play a role in weight gain, as the level of exercise, appetite increase, etc. and we have considered of importance their inclusion in this protocol. Previous studies did not assess visceral fat using widely standardized parameters as the waist index, which at certain levels is considered an indicator of the cardiovascular risk, or leptine, highly correlated to the body fat storage. We would like to fit the recently published American Diabetes Association, American Psychiatric Association, American Association of Clinical Endocrinologists and North American Association for the Study of Obesity Antipsychotic, obesity and diabetes mellitus consensus.22
  • Schizophrenic patients show a 4-fold probability to die as a consequence of cardiovascular problems compared to the normal population. The antipsychotic treatment can contribute to increase this risk favoring weight gain and the appearance of cardiovascular risk factors associated to obesity (blood hypertension, hyperlipidemia, type II Diabetes Mellitus). We intend to obtain a complete cardiovascular risk profile of patients, as well as its change during antipsychotic treatment, including primary cardiovascular risk factors in addition to the analysis of markers that have recently been linked to cardiovascular risk (as reactive protein C).
  • The study will evaluate the risk of hyperglycemia, insulin resistance and Diabetes Mellitus, and will investigate the association between glucose homeostasis abnormalities and weight gain in the treated patients. Likewise, adiponectine, secreted from adipocytes and a possible link between obesity and insulin resistance will be determined; recent studies show an adiponectine decrease in humans with insulin resistance and obesity; furthermore, prospective studies have shown these changes could predict a higher risk of DM development.
  • Changes have been introduced in the complete evaluation of the patient's metabolic and cardiovascular profiles with the advice, and under the coordination of endocrinologists after a complete review of the subject

Condition or disease Intervention/treatment Phase
Schizophrenia Drug: Ziprasidone Drug: Olanzapine Procedure: Scales Procedure: measures of the body (Weight...) Procedure: Serum analysis Phase 4

Study Type : Interventional  (Clinical Trial)
Enrollment : 112 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: Ziprasidone Versus Olanzapine In The Treatment Of Schizophrenia: A Six Months, Double Blind Randomized, Parallel Group Study.
Study Start Date : April 2003
Study Completion Date : February 2007

Primary Outcome Measures :
  1. To estimate and compare the effects of ziprasidone vs olanzapine on body weight in the treatment of patients with schizophrenia.

Secondary Outcome Measures :
  1. PANSS total score; change from baseline CGI severity; change from baseline CGI - Improvement PANSS negative subscale score; change from baseline DSM IV axis V Patient preference scale (PPS) Heath Utility Index Mark III BMI , Qaist Index

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Ages Eligible for Study:   18 Years to 70 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patients with a primary diagnosis of schizophrenia using the DSM-IV-TR criteria
  • Patient's clinical condition should justify treatment initiation with a new antipsychotic drug.

Exclusion Criteria:

  • Patients at immediate risk of committing harm to self or others
  • Concurrent treatment with antipsychotic agents after randomization.

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): NCT00239109

Pfizer Investigational Site
Bilbao, Vizcaya, Spain
Pfizer Investigational Site
Badajoz, Spain
Pfizer Investigational Site
Barcelona, Spain
Pfizer Investigational Site
Madrid, Spain
Pfizer Investigational Site
Salamanca, Spain
Pfizer Investigational Site
Sevilla, Spain
Pfizer Investigational Site
Zamora, Spain
Sponsors and Collaborators
Study Director: Pfizer Call Center Pfizer

Additional Information: Identifier: NCT00239109     History of Changes
Other Study ID Numbers: A1281064
First Posted: October 14, 2005    Key Record Dates
Last Update Posted: March 18, 2008
Last Verified: March 2008

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