Gui Zhi has the effect of sweating and relieving muscles; it is used to treat wind-cold and cold, blood-cold and menstrual closure; the daily dosage for adults is 3~9g. Gui Zhi is the young branch of Cinnamomum cinnamomi in the family of Camphoraceae, with the effects of sweating and relieving muscles (relieving evil qi from the surface of the skin), warming and circulating the meridians, assisting yang in transforming qi, and leveling Chong and descending qi; it is used in the treatment of wind-cold cold and flu, epigastric cold and abdominal cold pain (the feeling of cold pain in the stomach and abdomen), blood-cold meridian occlusion, paralysis of the joints, phlegm (the pathologic product of the disordered metabolism of fluids and liquids), edema, palpitation (the heartbeat is accelerated, often accompanied with panic) and running dolphin. The adverse effects of taking Gui Zhi are not clear; note that it is contraindicated in people with fever, yin deficiency and fire (deficiency of yin and essence in the body, resulting in hyperactivity of deficiency fire), and blood-heat paranoia. If you need to use the drug is recommended to be used under the guidance of a traditional Chinese medicine practitioner to identify the evidence, unauthorized use of drugs may cause adverse consequences.