Intravenous cimetidine as an effective treatment for systemic anaphylaxis and acute allergic skin reactions.

Intravenous cimetidine treatment was prescribed for patients suffering from anaphylaxis, urticaria, pruritus, and contact dermatitis. Most of these patients recovered promptly from shock status, itching, and/or flushing after the administration of cimetidine. Intravenous cimetidine therefore may be an effective treatment for those allergic reactions.