Prevalence and preventability of adverse drug events in a teaching hospital: a cross-sectional study

We determined the prevalence of adverse drug events [ADEs] in a general teaching hospital in Rabat, Morocco. We performed a 5-day cross-sectional study of hospital departments recruiting inpatients and outpatients. Among the 1390 patients surveyed, 59 [4.2%] experienced at least 1 ADE and for 20 patients [1.4%] the ADE was responsible for hospitalization or prolongation of hospitalization. The ADE was classified as serious in 28 patients. Of the total of 76 ADEs, 10 [13.2%] were categorized as preventable; 6 of these occurred during the treatment monitoring phase. Patients who experienced an ADE were more likely to be women, to be younger [< 30 years] and to be hospitalized in medical departments