Despite the clinical guidelines regarding the use of combined antipsychotics and the limited evidence for its benefits, use remains high in psychiatric practice. The aim of this study was to examine prescribing practices and investigate reasons for initiating and continuing combined antipsychotics in stable psychiatric illnesses.

A cross-sectional case record survey of antipsychotic prescribing practices in a community psychiatric rehabilitation service. A total sample (n = 75) of patients with chronic and enduring psychiatric illnesses was studied. The age, gender, diagnosis and prescribed antipsychotics were examined. The proportional prevalence and documented reasons for combined antipsychotic prescribing were analysed.

Seventy-three of the 75 patients were prescribed antipsychotic mediations. Of these, 44 (60%) received a combination of two or more antipsychotics. The most common reason for combined prescribing was a switch of antipsychotic (n = 18; 41%). No reason was documented in 19 cases (43%).

In this study, slow cross-tapering or incomplete switch process of antipsychotics contributed to the prolonged period of combined antipsychotics treatment. Adequate documentation regarding indication and review of medications cannot be overemphasized.