Tincture of the Root of the Monkshood or Aconite plant. A deadly sedative poison in any but very small doses. It acts mainly on the nervous system, but indirectly on the circulation. Some physicians use it in many cases of inflammatory fever, as in that of pneumonia, pleurisy, etc. Dose, one or two drops, in water, for a grown person, every two, three, or four hours. A bottle containing it should be labelled Poison.