Chai Hu plus Bamboo Roots has the effects of relieving exterior heat, dispersing the liver and resolving depression, clearing heat and resolving phlegm, removing vexation and stopping vomiting. 1. Chai Hu (柴胡)：It has the effects of relieving fever, dispersing the liver and relieving depression, and elevating yang qi. It is often used in the treatment of colds and fever, cold and heat (the body is hot and cold at the same time), liver depression and stagnation of qi, distension and pain in the chest and ribs, menstrual disorders, and qi deficiency and subsidence. The adverse effects of this drug are not clear, and it is not recommended for people with yin deficiency and hyperactivity of yang, internal movement of liver wind, yin deficiency and fire, and upward reversal of qi. 2. Bamboo Root: It has the effect of clearing away heat and resolving phlegm, removing vexation and stopping vomiting, it is mostly used in the treatment of gastric fever and vomiting, eructation (hiccups), deficiency vexation (vexation caused by deficiency heat in the body), insomnia, pregnancy dysentery (in early pregnancy, there is a heavy nausea and vomiting, dizziness and anorexia, or even vomiting when eating), cough with heat in the lungs, yellowish and thick phlegm, and feverish eclampsia of children and other illnesses. The adverse effects and contraindications of this drug are not clear. Simultaneous application of Chai Hu and Zhu Ru is mainly to clear heat, dissolve phlegm, relieve depression, stop vomiting and other efficacious effects. It is more suitable to be used together in cases of liver depression and stagnation of qi, liver depression and fire (liver qi is blocked leading to the production of fire and heat), vomiting, stomachache, fever, and so on. It is recommended to use the medicine under the guidance of a doctor after identifying the symptoms.