New study and guidelines open the door to correcting penicillin allergy diagnosis

The Australasian Society of Clinical Immunology and Allergy has issued new guidelines calling for a reassessment of penicillin allergy diagnoses in adults, after evidence showed that more than 90% of those registered as allergic can tolerate the antibiotic following proper evaluation. Estimates suggest that around 2.8 million Australians may carry an inaccurate diagnosis.

The Australasian Society of Clinical Immunology and Allergy has issued new medical guidelines calling for a reassessment of penicillin allergy diagnoses in adults, after evidence showed that more than 90% of people registered as allergic to this antibiotic can tolerate it after undergoing appropriate evaluation and tests. According to the society, about 10% of the population reports having a penicillin allergy, while the actual allergy is believed to affect less than 1% of the population, indicating that large numbers of patients may retain an inaccurate diagnosis that has not been reviewed for years. The society estimates that around 2.8 million Australians may have a recorded diagnosis or report an allergy to penicillin, some dating back to childhood or reactions that occurred decades ago, without subsequent tests to confirm the allergy's persistence. The Guardian highlighted the new guidelines, which aim to help doctors identify patients who can be reassessed, thereby expanding available treatment options and avoiding unnecessary exclusion of penicillin. The US Centers for Disease Control and Prevention explain that a recorded penicillin allergy may sometimes be based on symptoms that do not reflect a true allergic reaction, such as a rash during a viral infection, diarrhea after taking the antibiotic, or a family history of allergies.