Castor Oil.
Chloral Hydrate: subcutaneously, alone, or with morphine, in the stage of collapse.
Chloroform: 2 or 3 min., either alone or with opium, every few minutes to allay the vomiting.
Cinnamon.
Copper Arsenite.
Copper salts: sometimes used to stop vomiting.
Corrosive Sublimate.
Counter-Irritation over epigastrium.
Creolin.
Creosote: alone or with opium, to allay vomiting.