Reasonable use of Chaihu under the guidance of a doctor is generally harmless to the liver, Chaihu has the effect of dredging the liver and relieving depression (by dredging the liver’s qi to treat depression) and other effects, the specific use of the doctor’s advice. Chaihu is a traditional Chinese medicine made from the dried root of the plant Chaihu or narrow-leaved Chaihu of the family Umbelliferae, with the effects of dispersing the liver and relieving depression, elevating yang qi, and relieving superficial fever. It is used as a main treatment for superficial fever, liver depression, stagnation of qi (the liver’s qi and blood transportation is not smooth, and emotional and mental depression), qi deficiency and sinking, the shao yang syndrome, and relieving fever and intercepting malaria (to eliminate the heat evil and treat malaria), and prolapse of the organs. Chaihu should be avoided or used with caution in yin deficiency and hyperactivity of yang (deficiency of yin fluid and hyperactivity of yang energy), internal movement of liver wind, yin deficiency and hyperactivity of fire (deficiency of yin essence and hyperactivity of deficiency fire in the body), and qi upward reversal of qi, and it is not suitable to be used with western medicines containing various metal ions (e.g., calcium or ferrous preparation, aluminum hydroxide preparation, etc.), as well as vitamin C. Specific medication should be carried out under the guidance of a physician, and should not be used without authorization.