Dose response to codeine in patients with chronic cough.
D000284:Administration, Oral; D000368:Aged; D001991:Bronchitis / Q000188:drug therapy; D002908:Chronic Disease / Q000188:drug therapy; D002986:Clinical Trials as Topic; D003061:Codeine / Q000008:administration & dosage*; D003371:Cough / Q000188:drug therapy*; D004646:Emphysema / Q000188:drug therapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D010919:Placebos; D013997:Time Factors
D010919:Placebos; D003061:Codeine