Prevalence of Antipsychotic Polypharmacy and Associated Factors among Outpatients with Schizophrenia Attending Amanuel Mental Specialized Hospital, Addis Ababa, Ethiopia.

Background. Despite recommendations by guidelines to avoid combinations of antipsychotics unless after multiple trials of antipsychotic monotherapy, it is quite a common practice to use combinations. This practice leads to unnecessary expenses and exposes the patient to severe drug adverse effects.