Adverse Drug Related Events (ADREs) are a leading cause of Emergency Department (ED) visits in Canada. However emergency physicians recognize only half of all ADREs in patients presenting to the ED, missing opportunities to intervene. The objective of this study is to develop a screening strategy that identifies patients with ADREs. Our hypothesis is that the development of a user-friendly, reliable screening strategy for ADREs in patients presenting to the ED is feasible. We believe that this will lead to improved patient care.