Effects: Reconciling the exterior and interior, dispersing the liver, and elevating the yang. It is used for treating colds and fever. Effects: Cold and fever, cold and heat, chest and hypochondriac distension, menstrual disorders, prolapse of the uterus, prolapse of the anus. Chaihu is a traditional Chinese medicine, which is further divided into two types: Southern Chaihu and Northern Chaihu. It is generally distributed in the northeast, north China, northwest, east China, Hubei, Sichuan and other places. It has a bitter and slightly cold flavor, and its taste goes into the liver and gallbladder meridian, so it is a meridian-inducing medicine for the liver and gallbladder meridian, as well as the main medicine for treating lesions of the liver and gallbladder meridian.

The principles are:

1. Antipyretic. Animal experiments have confirmed that it has antipyretic effect. Clinical observation of its antipyretic effect is smooth and reliable, but still less effective than Scutellaria baicalensis.

2, sedative, analgesic. It has the effect of relieving chest tightness and dystocia, opening depression and regulating menstruation.

3, antibacterial. In vitro test team tuberculosis mycobacterium growth inhibition.

4, antiviral. Influenza virus has a strong inhibitory effect. In addition, it has the effect of inhibiting the cytopathy caused by type 1 poliomyelitis virus.

"Diannan Materia Medica": "Sweating with Chai Hu in typhoid fever, to four days before available: if used in the first place, the introduction of yang syndrome into the yin meridian, when the use of contraindication."

Benjing Fengyuan: "Chaihu, children's five chancre won heat, all malaria cold and heat, savory should be used. Pox rash after seeing the point of cold and heat, or pain and heat under the hypochondrium, in the transmitting tablets used within the medicine, not to make the heat to stay in the Shaoyang meridian, then the future without biting the teeth of the disease."