This section is from the book "Materia Medica And Therapeutics: An Introduction to the National Treatment of Disease", by John Mitchell Bruce. Also available from Amazon: The pharmacology and therapeutics of the materia medica.
Muscariae Nitras-(Not Officinal.)-Nitrate of Muscarin, the liquid alkaloid of Agaricus muscarius or Amanita muscaria, the Fly Agaric.
Dose.-1/30 to 1/3 gr.
The action of muscaria is almost exactly opposed to that of atropia in every respect, except that it dilates the pupil when applied locally. It also contracts the pulmonary vessels. It has been used as an annidrotic.