Medicinal plants are used as a primary element of traditional medicine in a significant part of the world, and they also directly or indirectly serve as the source for a large portion of modern medicines. Physicians and medical students, concerned with benefiting people and avoiding harm, may consider incorporating phytotherapy—which is entering a new era with today's capabilities—into their medical practice as they learn about the valuable properties of medicinal plants. This book serves as a guide for medical professionals interested in phytotherapy.