Table 2:

Distribution of beta-lactam allergy reaction description documented in electronic health records among unique patients with a beta-lactam allergy indicated.^a

Reaction Description	Number of Beta-Lactam Reactions Documented	%
Skin Rashes/Hives	18 553	49.1
Empty or Missing	13 679	36.2
Nausea/Vomiting/Diarrhea	2533	6.7
Asthma/shortness of breath	1879	5.0
Shock/Unconsciousness	1049	2.8
Anemia/Blood disorder	95	0.3

^aThere were 29 095 unique patients with a documented beta-lactam allergy and 37 788 allergy reaction descriptions. Some patients had more than one allergy reaction to beta-lactams documented in their chart.