This richly illustrated reference treats the subject of herbal medicines in an integrated fashion with reference to pharmacognosy, pharmacology and toxicology. It enables internists, phytotherapists, physicians, healthcare practitioners as well as students to understand why, when and how herbal medicines can be used in the treatment of diseases. Clinical and toxicological findings of herbs and their dosages are described. A great deal of pathology and therapeutic information is included. The most important medicinal plants and drugs are illustrated with exceptional 4-color plates. In addition, 2-color tables and figures clarify complex mechanisms.