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Antibiotic allergy.

Kimberly G Blumenthal1, Jonny G Peter2, Jason A Trubiano3

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Many antibiotic reactions are mislabeled as allergies, leading to increased antibiotic resistance and adverse events. Most patients labeled with penicillin allergy are not truly allergic and can be safely de-labeled through testing.

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Area of Science:

  • Immunology
  • Pharmacology
  • Public Health

Background:

  • Antibiotics commonly cause severe immune-mediated drug reactions, including anaphylaxis and cutaneous adverse events.
  • Many reported antibiotic "allergies" are misdiagnoses, intolerances, or unrelated reactions, posing minimal patient risk but significant public health concerns.
  • Incorrect antibiotic allergy labels lead to the use of broader-spectrum antibiotics, increasing adverse events and antimicrobial resistance.

Purpose of the Study:

  • To provide a global overview of antibiotic allergy.
  • To discuss the epidemiology, classification, mechanisms, and management of antibiotic allergy.
  • To highlight the public health implications of inaccurate penicillin allergy labels.

Main Methods:

  • Review of current literature on antibiotic allergy.
  • Analysis of epidemiological data on antibiotic hypersensitivity.
  • Examination of mechanisms underlying drug reactions and intolerances.
  • Evaluation of diagnostic and management strategies for antibiotic allergy.

Main Results:

  • A significant proportion of patients labeled with antibiotic allergies, particularly penicillin allergy, are not truly allergic upon proper evaluation.
  • Inaccurate allergy labeling results in suboptimal antibiotic selection, increased healthcare costs, and contributes to antimicrobial resistance.
  • Effective risk stratification, testing, and graded drug challenges can de-label most patients with presumed penicillin allergy.

Conclusions:

  • Antibiotic allergy labels are a major public health issue, driven by misdiagnosis and lack of accurate testing.
  • De-labeling patients with non-allergic penicillin reactions is crucial for improving antibiotic stewardship and reducing resistance.
  • Comprehensive management strategies are needed globally to address the challenges posed by antibiotic allergy labels.