RT Book, Section A1 Scott, Jordan A1 Riester, David A2 Zaoutis, Lisa B. A2 Chiang, Vincent W. SR Print(0) ID 1146114824 T1 Drug Allergy T2 Comprehensive Pediatric Hospital Medicine, 2e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9780071829281 LK accesspediatrics.mhmedical.com/content.aspx?aid=1146114824 RD 2024/04/18 AB Adverse drug reactions are broadly defined by the World Health Organization as “any noxious, unintended, and undesired effect of a drug that occurs at doses used for prevention, diagnosis, or treatment.”1 These reactions can be classified into types A and B.