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Review: metformin is effective at attenuating the metabolic risks associated with use of atypical antipsychotics

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Question

Question

Can metformin reduce the degree of weight gain and insulin resistance associated with use of atypical antipsychotic agents?

Outcomes

Changes in anthropometric measures including body weight, body mass index, waist circumference and insulin resistance in individuals taking atypical antipsychotics (AAP). Insulin resistance was determined using the homeostasis model assessment of insulin resistance (HOMA-IR) which is calculated as (fasting insulin in µU/ml × fasting blood glucose in mg/dl)/405.

Methods

Design

Systematic review and meta-analysis.

Data sources

MEDLINE, EMBASE, Cochrane CENTRAL were systematically searched up to 31 December 2008. Hand searching for additional studies from reference lists of other studies and reviews was also conducted.

Study selection and analysis

Randomised, placebo controlled trials were included if they assessed metformin use in participants taking AAP and had adequate reporting of anthropometric measures, including insulin resistance. No exclusions were made on the basis of language. Studies were independently assessed by two reviewers who also assigned Jadad scores to the included studies to assess methodological strength based on reporting of randomisation, double blinding and loss to follow-up. …

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Footnotes

  • Sources of funding None.

Footnotes

  • Competing interests None.

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