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.
Dioscorea, Wild Yam. This antispasmodic and anodyne is usually incorporated in the formulae of "female regulators." Its action is upon griping pain or colic in the stomach or bowels. It is especially useful in bilious colic and the pain of muscular spasm in the intestines. The pain occasioned by the passing of gall-stones is much relieved by it. Spasmodic affections of the pelvic viscera and after-pains come within its sphere of action. F.e. or ec. tr., 3 to 60 I. ; seldom above 20 or 30 I.