[Clinical studies of the antitussive and expeotorant properties of Hederix].
D000996:Antitussive Agents; D035843:Biomedical Research; D003061:Codeine / Q000031:analogs & derivatives; D006801:Humans; D010946:Plants, Medicinal / Q000628:therapy*
D000996:Antitussive Agents; D003061:Codeine
CODEINE/related compounds; PLANTS, MEDICINAL/therapy