Xiao Chaihu can be used to treat wind-heat colds, i.e., fever and colds. Xiao Chaihu Granules is a medicine for treating wind-heat colds and flu. Xiao Chaihu Granules has the efficacy effect of relieving exterior heat and dispersing heat, dredging the liver and harmonizing the stomach (dredging the liver qi, harmonizing the spleen and stomach). It is used for the treatment of external evil invasion of the human body with the condition of Shaoyang meridian. Xiao Chaihu Granules are used in the treatment of exogenous diseases, evils violating the Shaoyang meridian (between the half-expression and half-li) manifesting as cold and heat (the body is hot for a while and cold for a while), bitter fullness in the chest and hypochondriacs (feeling fullness and discomfort in front of the chest and at the two sides), loss of appetite, upset and nausea, and bitter taste and dryness of the mouth and throat, and so on. The adverse reactions and contraindications of Xiao Chaihu Granules are not clear at present. Avoid smoking, alcohol, spicy, cold and greasy food during the period of taking Xiao Chaihu Granules; it is not recommended to take tonic Chinese medicine during the period of taking the medicine; it is not suitable to be taken at the early stage of wind-cold flu. It is recommended that patients should consult a doctor in a timely manner after discomfort occurs, and need to follow the doctor’s instructions to choose drugs, do not self-medication, so as not to delay the condition.