is codeine related to morphine
Opium. The air-dried exudate from the unripe seed capsule of the opium poppy, Papaver somniferum, or its variant, P. album. It contains a number of alkaloids, but only a few-MORPHINE; CODEINE; and PAPAVERINE-have clinical significance. Opium has been used as an analgesic, antitussive, antidiarrheal, and antispasmodic. Morphine. The principal alkaloid in opium and the prototype opiate analgesic and narcotic.