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Efficacy of Lifestyle Interventions and Metformin for the Treatment of Antipsychotic-Induced Weight Gain

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.
ClinicalTrials.gov Identifier: NCT00451399
Recruitment Status : Completed
First Posted : March 23, 2007
Last Update Posted : October 31, 2007
Information provided by:
Central South University

Brief Summary:
Lifestyle intervention and certain medications have been shown to be effective for antipsychotic-induced weight gain, but no controlled studies have compared psychological and pharmacological therapies. We conducted a randomized, placebo-controlled study to test the efficacy of lifestyle intervention and metformin alone and in combination for antipsychotic-induced weight gain.

Condition or disease Intervention/treatment Phase
Weight Gain Drug: metformin Behavioral: lifestyle intervention Phase 4

Central South University has indicated that access to an investigational treatment associated with this study is available outside the clinical trial.  

Detailed Description:
The study was designed as a double-blind randomized controlled trial, with research assessors and patients intended to be blind to the intervention status. The staff members performing the assessment were not involved in implementing any aspect of the intervention.128 patients were randomized to one of four 12-week individual treatments: metformin (750mg/day), placebo, lifestyle intervention plus metformin (750mg/day) or lifestyle intervention plus placebo. Medications were provided in double-blind fashion.The assessments include body weight, body mass index, waist circumference, fasting glucose, fasting insulin and insulin resistance index.

Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 128 participants
Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: Efficacy of Lifestyle Interventions and Metformin for the Treatment of Antipsychotic-Induced Weight Gain: a Randomized Double-Blind Placebo- Controlled Comparison
Study Start Date : October 2004
Study Completion Date : December 2006

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Body Weight
U.S. FDA Resources

Primary Outcome Measures :
  1. body weight, body mass index, waist circumference, fasting glucose, fasting insulin, insulin resistance index

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 45 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • All participants met the Diagnostic and Statistical Manual of Mental Disorder-Fourth Edition (DSM-Ⅳ) criteria for schizophrenia27.
  • Participants were required to get weight gain more than 10% of their predrug body weight during less than 12 months of treatment with a targeted antipsychotic agent- clozapine, olanzapine, risperidone or sulpiride.
  • The duration of illness for all participants was less than 12 months.
  • Participants could be taking only one antipsychotic, whose dose had not changed by changed by more than 25% over the past 3 months.
  • All patients were stable outpatient.
  • The total score of Positive and Negative Syndrome Scale (PANSS) for all patients could be ≤60.
  • All participants were ensured that they could be carefully taken care of by one of their parents or guardians during the trial.

Exclusion Criteria:

  • Participants were excluded from the study if they had evidence of liver or renal diseases, pregnant or lactating women, cardiovascular diseases, hypertension or diabetes mellitus, specific systemic diseases, or conditions that limited their ability to perform the lifestyle modifications, such as arthritis, pulmonary diseases, neurological or dietary restrictions.

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 ClinicalTrials.gov identifier (NCT number): NCT00451399

China, Hunan
Institute of Mental Health of The Second Xiangya Hospital, Central South University
Changsha, Hunan, China, 410011
Sponsors and Collaborators
Central South University
Study Director: Jingping Zhao, MD Central South University

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
ClinicalTrials.gov Identifier: NCT00451399     History of Changes
Other Study ID Numbers: Jzhao
First Posted: March 23, 2007    Key Record Dates
Last Update Posted: October 31, 2007
Last Verified: October 2007

Keywords provided by Central South University:
Weight gain
lifestyle interventions
antipsychotic-induced weight gain.

Additional relevant MeSH terms:
Body Weight
Weight Gain
Signs and Symptoms
Body Weight Changes
Antipsychotic Agents
Hypoglycemic Agents
Physiological Effects of Drugs
Tranquilizing Agents
Central Nervous System Depressants
Psychotropic Drugs