It’s a fairly common scenario—an infant or young child develops an ear infection or strep throat. Their pediatrician prescribes a penicillin antibiotic. The child later develops a symptom—a rash, an upset stomach or a headache—and a doctor declares them “allergic to penicillin.” From then on, that child will only be…
Source: LifeHacker – Your Child May Not Actually Be Allergic to Penicillin