Australia's peak immunology body has updated clinical guidelines after finding that up to 90 percent of people who report penicillin allergies do not actually have them.
Penicillin ranks among the most commonly prescribed antibiotics in Australia. Medical records have long listed allergies in roughly 10 percent of the population, or about 2.8 million Australians. The new evidence challenges that figure substantially.
The guideline change aims to address two problems. First, false penicillin allergy labels force doctors to prescribe alternative antibiotics that may be less effective, leading to longer hospital stays. Second, overuse of substitute antibiotics accelerates antimicrobial resistance, a growing threat to public health globally.
The source does not provide the name of the immunology body, the specific mechanisms of how allergies were misidentified, or details on what the updated guidelines now recommend. The article does not explain how the 90 percent figure was determined, what testing methods revealed the mislabeling, or when the guidelines take effect.