Systemic contact dermatitis from subcutaneous hydromorphone.

We report a patient who developed a generalized dermatitis after a period of progressive local intolerance to continuous subcutaneous infusion of hydromorphone for cancer pain. Sensitization to hydromorphone was proved by a positive patch test. Infusions with an equianalgesic dose of diacetylmorphine were well tolerated, without local or systemic side-effects, and prolonged the duration of infusion sites.