Chinese Tonic Herbs . Japan Publications, New York, NY, 1994. The Therapeutic Use of Phytomedicinals . Pharmaceutical Products Press, Binghamton, NY, 1994. Know how much herb to take for a specific condition and for how long.
Preparations vary in dosage.
Many herbs cannot be taken long-term without risking significant side effects Study the known side effects of herbs. For example, ginseng should not be taken by anyone with high blood pressure or during an illness with a fever. If you experience headaches, rashes, diarrhea or breathing problems when taking an herb, discontinue its use and evaluate. These signs may suggest that the dosage was not correct for you or you have an allergy to an herbal ingredient. The best herbal preparations are those that are recommended or prepared specifically for you by a master herbalist.