IntroductionClozapine, while effective in treatment refractory schizophrenia, is associated with significant weight gain, heart disease and increased risk of type 2 diabetes mellitus (T2DM). Although there is evidence for weight loss with metformin for people with obesity who are already taking clozapine, there have been no published trials that have investigated the effect of metformin in attenuating weight gain at the time of clozapine initiation.Methods and analysisA 24-week double-blind placebo-controlled trial of concomitant prescription of metformin at clozapine commencement. Eighty-six people being commenced on clozapine will be randomised to placebo or metformin (variable dose, up to 2 g/day). The primary outcome is comparative end point body weight, between the placebo and metformin groups. Secondary outcomes are comparative rates of conversion to T2DM, alteration of metabolic syndrome parameters, proportion gaining >5% body weight and changes in diet and appetite. We will additionally examine biomarkers associated with change in weight among trial participants.Ethics and disseminationEthics approval was granted by the Metro South Human Research Ethics Committee HREC/17/QPAH/538-SSA/17/QPAH/565. We plan to submit a manuscript of the results to a peer-reviewed journal, and present results at conferences, consumer forums and hospital grand rounds.Trial registration numberACTRN12617001547336; Pre-results.

As 'gatekeepers-in-waiting', these general practitioners will have a vital role in effective implementation of the early intervention service for psychosis. However, their knowledge needs improvement, through regular educational sessions, and this service must be responsive to their needs. In addition, general practitioners' concerns regarding the potential for increased workload must be adequately addressed in order to maintain enthusiasm and collaboration at the interface between primary care and mental health services, particularly in the context of early intervention.

Objective To describe different ways to improve liaison between psychiatrists and general practitioners in Australia. Conclusion Strengthening the links between psychiatry and GPs in primary care is an effective approach to improve the mental health of Australians.

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