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. 2009 Mar-Apr;16(2):211–219. doi: 10.1197/jamia.M2933

Table 2.

Table 2 Most Frequently Reported Allergen Classes

Patient Number MeSH Class Patient Number MeSH Class
20,616 Penicillins 853 Salicylic Acids
7,641 Codeine 726 Sulfamethoxazole
7,385 Sulfonamides 723 Meperidine
3,254 Aspirin 706 Cephalexin
1,854 Morphine 659 Carbenicillin
1,807 Acetaminophen 512 Tetracyclines
1,546 Erythromycin 469 Prochlorperazine
1,483 Ibuprofen 395 Ketorolac
1,310 Cephalosporins 382 Diphenhydramine
1,310 Propoxyphene 368 Sulfacetamide
1,069 Amoxicillin 348 Cefaclor
990 Hydrocodone 319 Promethazine