Expanded pharmacology and toxicology chapters provide thorough information on the chemical basis of herbal medicine. Explores the evolutionary relationship between plants and mammals, which is the basis for understanding the unique physiologic effects of herbs. Includes a body systems review of herbal remedies for common disease conditions in both large and small animals. Discusses special considerations for the scientific research of herbs, including complex and individualized interventions that may require special design and nontraditional outcome goals.