Dose.—From twenty grains to one drachm.
The common Sweet Flag, or Calamus, is an aromatic stimulant and mild tonic. In its action it resembles Canella and Angelica. It is but little used by the profession, but might be substituted for the more costly imported aromatics. It has been used in asthenic fevers attended with great prostration and weakened digestive powers, and is occasionally used in the treatment of intermittents.