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Related Experiment Videos

Anaphylaxis to erythromycin

G Jorro1, C Morales, J V Brasó

  • 1Servicio de Alergia, Hospital Clinic Universitari, Valencia, Spain.

Annals of Allergy, Asthma & Immunology : Official Publication of the American College of Allergy, Asthma, & Immunology
|December 1, 1996
PubMed
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A patient experienced anaphylaxis after taking erythromycin, despite previous tolerance. A positive oral challenge and Prausnitz-Küstner test confirmed specific IgE antibodies to erythromycin, indicating a rare allergy to this macrolide antibiotic.

Area of Science:

  • Clinical immunology
  • Pharmacology
  • Allergy and immunology

Background:

  • Erythromycin, a macrolide antibiotic, is generally well-tolerated, with dose-related gastrointestinal side effects being most common.
  • Severe allergic reactions, including anaphylaxis, are uncommon but documented in medical literature.
  • Patients with a history of antibiotic allergies require careful consideration for alternative treatments.

Observation:

  • A 24-year-old male with a prior penicillin allergy developed anaphylaxis shortly after ingesting erythromycin.
  • Despite previous uneventful exposures to erythromycin, this episode was severe, requiring immediate medical intervention.
  • Standard skin testing for erythromycin was inconclusive due to hyperreactivity.

Findings:

  • Specific IgE antibodies to erythromycin were not detected by standard RAST testing.

Related Experiment Videos

  • A positive oral challenge test and Prausnitz-Küstner test strongly indicated an IgE-mediated anaphylactic reaction to erythromycin.
  • The case highlights the potential for developing de novo allergies to antibiotics.

    • Implications:

    • This case underscores the importance of considering anaphylaxis in patients presenting with severe reactions to commonly prescribed antibiotics like erythromycin.
    • The positive Prausnitz-Küstner test confirms the presence of specific IgE antibodies, aiding in accurate diagnosis of erythromycin allergy.
    • Further research may be needed to understand the mechanisms behind rare, yet severe, allergic responses to macrolide antibiotics.