Seniors are 12.6% of population but 33.6% of serious adverse drug events Senior citizens represent a disproportionate share of adverse drug events as the number of serious outcomes reported to the U.S. Food and Drug Administration (FDA) more than doubled between 1998 and 2005, as did deaths associated with adverse drug events, according to a report in the September 10 issue of Archives of Internal Medicine, one of the JAMA/Archives journals. A serious adverse drug event, as defined by the FDA, means an adverse event that resulted in death, a birth defect, disability, hospitalization, or was life-threatening or required intervention...