derivative of opium; used as an antitussive (to relieve coughing) and an analgesic (to relieve pain)
"After taking a dose of codeine, the patient found that both their persistent dry cough and severe muscle ache were finally under control."
An addictive alkaloid narcotic derived from opium and used as a hypnotic, analgesic and antitussive; often mixed with aspirin etc.
"After taking the codeine mixture for his cough and pain, he felt drowsy enough to finally fall asleep on the couch."