Medicine-related problems resulting in emergency department visits.

Objective: Our aim was to estimate the prevalence of medicine-related problems, understood as negative clinical outcomes, that result in hospital emergency department (ED) visits and to establish relationships among risk factors and the appearance of pharmacotherapy negative outcomes.

Methods: Methods A stratified two-stage probabilistic sampling approach was used which consisted of stratified random sampling of patients visiting the ED followed up by interviews. A systematic appraisal tool was used to identify pharmacotherapy negative outcomes within the framework of the information gathered.