This section is from the book "A Practitioner's Handbook Of Materia Medica And Therapeutics", by Thos. S. Blair. Also available from Amazon: A Practitioner's handbook of Materia Medica and Therapeutics.
Yerba De La Flecha, Sapium. A new purgative and diuretic, pleasant to the taste, and effective in doses of I to 5 I. of the fluidextract. Large doses are poisonous and highly dangerous. It has not been sufficiently studied to establish its range of safe employment.