Bleeding remains a common cause of emergency department (ED) visits and hospitalization around the world. A significant percentage of these bleeding events are drug induced. Anticoagulants were among the most frequently implicated drug class in hospitalizations among older adults (15.4%), and the second most frequently associated with adverse events in ED visits [1]. In a nationally representative ED data in 2002 and 2004 through 2005 in the United States, Warfarin was among the drugs most commonly implicated in adverse events [2].
