RT Book, Section A1 Riedel, Marc A. A2 Rudolph, Colin D. A2 Rudolph, Abraham M. A2 Lister, George E. A2 First, Lewis R. A2 Gershon, Anne A. SR Print(0) ID 7018791 T1 Chapter 197. Adverse Reactions to Drugs T2 Rudolph's Pediatrics, 22e YR 2011 FD 2011 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-149723-7 LK accesspediatrics.mhmedical.com/content.aspx?aid=7018791 RD 2024/04/23 AB Drug reactions encompass all adverse events related to drug administration, regardless of etiology.1 While adverse drug reactions are common, only a small portion of these represent drug hypersensitivity, defined as an immunologically-mediated response to a drug agent in a sensitized patient. In turn, only a subset of drug hypersensitivity reactions represent a true drug allergy, which refers specifically to a reaction mediated by IgE.2 These distinctions are important for optimal patient management, risk assessment, and education of patients regarding specific drug reactions.