A

David

Darling

codeine

Codeine is a white crystalline alkaloid extracted from opium by the methylation of morphine, and with the properties of weak morphine. It is a mild narcotic used in medicine as an analgesic, and in the treatment of coughs, sleeplessness, neuralgia, and asthma. It reduces bowel activity, causing constipation, and is used to cure diarrhea.