Many herbal treatments are chemical substances that are physiologically active but are not involved in the growth and development of the herbs themselves. Maceration, infusion, and decoction, percolation, soxhlet extraction, microwave-assisted extraction, ultrasound-assisted extraction or sonication extraction, accelerated solvent extraction, and supercritical fluid extraction are all methods for extracting and isolating biologically active chemical compounds from herbs. However, the efficacy of herbal medications is often reduced as a result of traditional delivery techniques. This book covers a wide range of topics, including herbal medicines, herbal extractions, herbal drug delivery systems, and various characterizations and in vitro studies of both oral and transdermal drug delivery systems, which can be used to determine the formulation and biologically active chemical compounds of herbal formulations. It offers a one-stop source of information on the essentials of herbal drug delivery systems, and will be useful as both an introduction and a more in-depth reference on recent advances in the field of herbal drug delivery systems.