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Summary
A child developed a pityriasis rosea-like rash after taking ketotifen (Zaditen). Diagnostic tests confirmed ketotifen as the likely cause of this drug-induced skin reaction.
Area of Science:
- Dermatology
- Pharmacology
Background:
- Drug-induced skin reactions are a significant concern in pediatric medicine.
- Ketotifen is an antihistamine and mast cell stabilizer used for allergic conditions.
Observation:
- A 4-year-old female presented with a widespread rash resembling pityriasis rosea.
- The eruption appeared shortly after initiating ketotifen treatment.
Findings:
- Circumstantial evidence linked ketotifen to the skin eruption.
- The Multi-Derm Intradermal Test (MIF) and rat mast cell degranulation test confirmed ketotifen hypersensitivity.
Implications:
- This case highlights a potential adverse drug reaction to ketotifen in children.
- Diagnostic testing can confirm drug-induced pityriasis rosea-like eruptions.