Morphine bitartrate caused contact dermatitis in a
worker at a plant producing opium alkaloids. Morphine
hydrochloride and morphine bitartrate showed patchtest-
positive reactions in another patient with contact
dermatitis working in the production of concentrated
poppy straw. We observed a concomitant reaction
between a morphine base and a codeine base in a
patient with drug skin eruption due to codeine.
