Carbonic Acid Gas: inhalation in nervous cough.
Cerium: in cough associated with vomiting.
Chloral Hydrate: in respiratory neurosis.
Chloroform: with a low dose of opium and glycerin in violent paroxysmal cough; if very violent to be painted over the throat.
Codeine.
Cod-Liver Oil: one of the most useful of all remedies in cough.
Conium: in whooping cough.
Creosote: in winter cough.
Cubebs: along with linseed in acute catarrh.
Demulcents.