No drugs are more potent to this end than opium and its derivatives, and in particular morphia and codeia.
codeia is left in solution, and is obtained in octahedral crystals by spontaneous evaporation.
codeia, one of the alkaloids of opium, is strongly recommended by Tyson.
The commercial muriate of morphia frequently contains 3% to 4% of codeia.
codeia often produces less disturbance than opium or morphine.
alkaloid present in opium, 1838, from French codéine, coined, with chemical suffix -ine (2), from Greek kodeia "poppy head," related to kooz "prison," literally "hollow place;" kodon "bell, mouth of a trumpet;" koilos "hollow," from PIE root *kel- (see cell). Originally codeina; modern form is from 1881.
codeine co·deine (kō'dēn', -dē-ĭn)
An alkaloid narcotic derived from opium or morphine and used as a cough suppressant, analgesic, and hypnotic. Also called methylmorphine.