Drug interactions and adverse drug reactions in the older patients admitted to the emergency department.

Purpose: The aim of this study was to prospectively evaluate drug interactions and adverse drug reactions (ADRs) in the older patients admitted to the emergency department (ED) and to characterize risk factors.

Methods: In 80 patients aged 65 years and older medication history and ED drug administration were analysed. Medical records were analysed for ADRs by an expert panel which also evaluated their avoidability and causality.