The book The Bud Tender sheds light on how medical cannabis helps children and people cope with illness. It provides reference guides to herbal alternatives with medical International Classification of Diseases, Tenth Revision codes. Herbal medicines use plant's seeds or flowers for medicinal purposes. Herbalism has a long effective tradition over conventional medicine. This treatment method is now becoming mainstream because of its advantages over traditional medicines. Plants have been used for medicinal purposes since 3000 BC. Herbal medicine is used to treat many conditions, such as allergies, asthma, eczema, premenstrual syndrome, fibromyalgia, migraine, menopausal symptoms, chronic fatigue, irritable bowel syndrome, cancer, etc. Almost 25 percent of pharmaceutical products use herbals. It is best to take herbal supplements under the guidance of a trained health care provider. Since herbal medicines can potentially interact with prescription medications and may worsen certain medical conditions, be sure to consult with your doctor or pharmacist before taking any herbs.