Monitoring medication errors in an internal medicine service Errores de medicación en el servicio de medicina de un hospital de alta complejidad

Abstract

Background: Patients admitted to internal medicine services receive multiple drugs and thus are at risk of medication errors. Aim: To determine the frequency of medication errors (ME) among patients admitted to an internal medicine service of a high complexity hospital. Material and Methods: A prospective observational study conducted in 225 patients admitted to an internal medicine service. Each stage of drug utilization system (prescription, transcription, dispensing, preparation and administration) was directly observed by trained pharmacists not related to hospital staff during three months. ME were described and categorized according to the National Coordinating Council for Medication Error Reporting and Prevention. In each stage of medication use, the frequency of ME and their characteristics were determined. Results: A total of 454 drugs were prescribed to the studied patients. In 138 (30,4%) indications, at least one ME occurred, involving 67 (29,8%) patients. Twenty four perce