The Allergy to Antibiotics That Doesn't Exist: The Study That Revealed the Truth About Penicillin

A new study at Hillel Yaffe Medical Center found that approximately 99% of children suspected of being allergic to penicillin are not allergic at all. Over a five-year follow-up, 63.7% of the children resumed using the drug without any reaction. Dr. Vered Shichter-Konfino warns against misdiagnosis that could lead to the use of broad-spectrum antibiotics and resistance.

A new study at Hillel Yaffe Medical Center has found that the vast majority of children diagnosed with a penicillin allergy are not allergic at all. In the study, conducted under the guidance of Dr. Vered Shichter-Konfino, head of the Immunology and Allergology Unit, the children underwent an oral challenge test. The results showed that approximately 99% of them did not develop an allergic reaction during the test. The uniqueness of the study lay in the five-year follow-up of the resumed use of penicillin. Among 240 children with available follow-up data, 63.7% (153 children) resumed using penicillin and reported no allergic reactions. In contrast, 36.3% (87 children) were not documented as having resumed using the drug, either due to lack of clinical need or fear. Dr. Shichter-Konfino emphasized that a misdiagnosis of penicillin allergy could lead to the use of broad-spectrum antibiotics, side effects, and antibiotic resistance. The key message: a rash during antibiotic treatment does not necessarily indicate an allergy, and one should consult a specialist for clarification.