Xiao Chaihu has the formula Xiao Chaihu Tang and the proprietary Chinese medicine Xiao Chaihu Granules as an example. Xiao Chaihu Granules are suitable for cold and flu syndrome with external wind-cold and evils violating the Shaoyang (between the half-expression and half-ripples invaded by the evils), and the efficacy is not obvious for other cold and flu syndromes. Xiao Chaihu Granules is composed of Bupleurum Chinense, Semixia, Ginseng, Glycyrrhiza and other medicines, which has the efficacy of detoxifying the surface and dispersing heat, soothing the liver and the stomach, and can be clinically used in the treatment of exogenous diseases, evils violating the Shao Yang syndrome, with symptoms such as cold and heat (the body is hot for a while and cold for a while), bitter fullness of the chest and hypochondrium (the chest in front of the chest and the two sides feel distended and uncomfortable), loss of appetite, upset, happy and vomiting, bitter mouth and dry throat, and so on. The adverse reactions and contraindications of this product are not known. In the process of medication, do not consume tonic herbs, avoid smoking, alcohol and spicy, cold and greasy food. Cold and flu patients are recommended to consult a doctor in time, under the guidance of a professional doctor, using appropriate and correct medication for treatment.