Immunoglobulin E (IgE)-mediated drug sensitivity in children is uncomm
on. However, undefined skin rash following antibiotic ingestion in you
nger children is commonly observed in clinical practice. We studied 86
consecutively referred patients to our allergy clinic over a 5-year p
eriod. We found that the majority of children (80%) with skin rashes w
ere under 3 years of age. All the children had been treated with antib
iotics for a bacterial upper respiratory infection (URI; otitis media,
sinusitis, or pharyngitis), 73 (85%) had erythematous rash, 13 (15%)
had urticaria occurring 3-5 days after the treatment, and 43 (50%) rep
orted a repeated rash with the use of two or more different antibiotic
s. There were no reports of systemic reactions or histories of accompa
nying food allergy. When patients were given the suspected antibiotics
while they were well, none developed rash. However, in the next bacte
rial infection, 62 (72%) chose to receive dye-free suspensions of the
suspected antibiotics. Only three patients (3.5%) elected for the dye-
containing suspension. Of the 62 patients who received dye-free suspen
sions, only eight-developed a mild skin rash, which was managed succes
sfully, We conclude that a practical approach for non-IgE-mediated ski
n rash needs to be evaluated. The current practice of complete avoidan
ce of the suspected antibiotics without further evaluation may be unwa
rranted.