Outpatient Psychotropic Drug Interactions in a Public Psychiatry Hospital in Bahrain: An Audit Study

Psychotropic polypharmacy is particularly common which puts psychiatric patients at high risk for developing drug-drug interactions. We aimed to study potential interactions between psychotropic medications prescribed within the outpatient psychiatry setting. This was an audit study, which targeted a sample of outpatient prescriptions ordered within the outpatient clinics of the main psychiatry hospital in Bahrain over 2017. We studied the degree and correlation between psychotropic drugs. The total number of prescriptions in our sample was 992 (56.1% males, 43.9% females). Psychotropic polypharmacy was detected in 842 prescriptions (84.9%). Potential interactions between psychotropic drugs were observed in 550 prescriptions (56.4%). The degree of interaction was minor in 43 prescriptions (7.8%), significant in 419 prescriptions (76.2%), and serious in 88 prescriptions (16%). Schizoaffective disorder subjects were the most likely to suffer from interactions (64.6%), whereas prescriptions issued for those who had schizophrenia contained the least number of interactions (51.6%). The total number of interactions was strongly associated with polypharmacy (p < .001), and gender (p < .01), but not with age (p > .05) or diagnosis (p > .05). High prevalence of polypharmacy and interactions between psychotropic medications were observed in our sample, particularly of the significant grade.