The book discusses the screening of herbal drugs for pharmacological activity with regard to anti-fertility, anti-diabetic, anti-cancer, anti-anginal, anti-thyroid and many other conditions. New to this edition are topics such as herbal cosmetics, nutraceuticals, chemotaxonomy, recent changes in in vivo anti-cancer screening models and screening of cardiac glycosides, and methods of literature search and patenting of herbal drugs.