Proven Non-β-Lactam Antibiotic Allergy in Children

Background: Parallel to the increasing use of non-β-lactam (NBL) antibiotics, allergic reactions to this drug group seem to increase. Data about NBL antibiotic hypersensitivity in children are limited. The aim of this study is to evaluate characteristic reactions to NBL antibiotics in children. Method: Patients with suspected NBL allergy were assessed between 2011 and 2015. Characteristics of the reactions and results of skin and drug provocation tests (DPTs) were recorded. Results: In total, 96 patients aged 75.15 ± 56.77 months (range: 3-208) were assessed. Clarithromycin (63.6%) was the most common cause of reactions reported. After ingestion of NBL antibiotics, maculopapular rash, urticaria/angioedema and anaphylaxis presented in 48.9, 40.7 and 10.4% of the patients, respectively. Tests were performed in 85 patients. Intradermal tests were positive in 3 patients (clarithromycin, ciprofloxacin and cotrimoxazole) and DPT was positive in 1 patient (clarithromycin). Eleven patients could not be tested. Seven patients had severe anaphylaxis, and 4 patients with urticaria/angioedema had to take their medications at the time of the reaction so desensitization was performed. When only patients confirmed by tests were evaluated, NBL allergy was 4.7% (4/85) in our study group. However, when patients who could not be tested, but were regarded as suffering from drug hypersensitivity according to clinical findings, were included, the frequency of NBL allergy was 15.6% (15/96). Conclusion: Most of the children with suspected NBL do not have true hypersensitivity. The frequency of confirmed hypersensitivity is low, and thus a detailed history should be taken from patients with suspected NBL hypersensitivity and DPTs should be performed in patients without contraindications.
Int Arch Allergy Immunol 2016;169:45-50

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