Clarithromycin is a macrolide characterized by the presence of a 14-carbon-atom lactone ring (1). It is often used to treat bacterial infections including Helicobacter pylori and commonly serves as a substitute for patients with a penicillin allergy. Allergic reactions associated with use of macrolides are uncommon and occur in 0.4-3% of treatments (1). In this study, we describe a child presenting with an anaphylactic reaction to clarithromycin.
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