BACKGROUND: Antipsychotic-induced weight gain is a major concern in the treatment of psychosis. The efficacy of non-pharmacological interventions as well as the optimal intervention approach for this side-effect remain unclear. AIMS: To determine the effectiveness of non-pharmacological interventions and specific treatment approaches to control antipsychotic-induced weight gain in patients with first-episode or chronic schizophrenia. METHOD: Systematic review and meta-analysis of randomised controlled trials. RESULTS: Ten trials were included in the meta-analysis. Adjunctive non-pharmacological interventions, either individual or group interventions, or cognitive-behavioural therapy as well as nutritional counselling were effective in reducing or attenuating antipsychotic-induced weight gain compared with treatment as usual, with treatment effects maintained over follow-up. CONCLUSIONS: Non-pharmacological weight-management interventions should be a priority, particularly during the early stages of antipsychotic treatment. Preventive approaches have the potential to be more effective, acceptable, cost-efficient and beneficial.

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