Type I immediate hypersensitivity reaction to cyanocobalamin but not hydroxycobalamin.

Abstract

We report a case of a 42-year-old woman with a background of autoimmune polyglandular syndrome, who developed a type I immediate hypersensitivity reaction to intramuscular cyanocobalamin. Intradermal testing showed a positive reaction to cyanocobalamin. The patient was subsequently treated with intramuscular hydroxycobalamin after negative intradermal… (More)
DOI: 10.1111/j.1365-2230.2007.02584.x

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