Cross sensitivity between ciprofloxacin and levofloxacin for an immediate hypersensitivity reaction

Area of Science:

• Pharmacology
• Clinical Medicine
• Allergy and Immunology

Background:

• Appendicitis is a common surgical diagnosis.
• Fluoroquinolones are broad-spectrum antibiotics frequently used in treating various infections.
• Adverse drug reactions require careful monitoring and management.

Observation:

• A pediatric patient with subacute appendicitis developed erythematous papules after ciprofloxacin administration.
• The rash resolved upon discontinuation of ciprofloxacin and treatment with corticosteroids and antihistamines.
• Recurrence of the hypersensitivity reaction was observed upon subsequent treatment with levofloxacin.

Findings:

• The observed hypersensitivity reactions are likely mediated by IgE binding to the core structure of fluoroquinolones.
• A potential cross-sensitivity exists among fluoroquinolones due to conserved structural elements.
• The 7th position of the fluoroquinolone core structure may play a role in IgE binding and allergic responses.

Implications:

• Clinicians should be aware of potential cross-reactivity among fluoroquinolone antibiotics.
• Alternative antibiotic classes should be considered in patients with a history of hypersensitivity to a specific fluoroquinolone.
• Further research into the specific mechanisms of fluoroquinolone-induced hypersensitivity is warranted.