Caraway.
Chamomile Oil: in hysterical women.
Chloral Hydrate and Bromides: when severe in children.
Chloroform: by inhalation, to remove pain and flatulence.
Cocculus: during pregnancy.
Codeine.
Coriander.
Essential Oils: Aniseed, Cajeput, Camphor, Cardamoms, Cinnamon, Cloves, Peppermint Rue, Spearmint: all useful.
Ether: internally and by inhalation.
Fennel.