Pharmacoepidemiologic study of potential drug interactions in outpatients of a university hospital in

Background: Drug–drug interaction is a potential cause of adverse drug reactions. The incidence of such drug interactions in university hospitals in Thailand is unknown. Purpose: To estimate the rate of potential drug– drug interactions in outpatients of a typical Thai university hospital, and to identify risk factors for such interactions in Thai patients. Methods: One-year outpatients ’ prescription data were retrieved from the hospital computer records. Potential drug interactions were identi-fied using the existing drug-interaction database system. Potential interactions within a specific prescription and involving drugs prescribed 1-, 3- and 7-day earlier were searched for. Possibl