Be-Dew Lotion is a combination of three medicines: Diphenhydramine, Calamine and Camphor which treat allergic skin conditions.
Diphenhydramine is an antiallergic which works by blocking the effects of a chemical messenger (histamine), thereby relieving symptoms of skin allergy.
Calamine and Camphor are mild astringents which impart a cooling sensation on the skin to relieve minor irritations.