Systemic contact dermatitis from pseudoephedrine.

A patient with rhinitis developed systemic contact dermatitis when starting oral treatment with Rhinalair, containing pseudoephedrine hydrochloride. A few months later, another oral treatment Rinutan, containing norephedrine hydrochloride, provoked a more severe generalized eczema. Patch test reactions were strongly positive to ephedrine and pseudoephedrine, slightly positive to phenylephrine and negative to epinephrine. Norephedrine was not tested.