Book excerpt: Pushed by the increase in the knowledge of herbal drug constituents, their effects, and side effects, many herbal products are undergoing a transition from classic herbal teas to standardized extracts. This new edition takes the advances made in medicinal plants research and phytotherapy into account and offers reliable and essential information. It offers comprehensive discussion of the origins, constituents, effects, indications, and dosage of herbal drugs and phytopharmaceuticals. The text also includes phytopharmaceutical information such as types of extraction solvents, drug-to-extract ratios, and dosage recommendations for extracts.