Si Jun Zi Tang is a tonic, which has the effect of tonifying Qi, benefiting Qi and strengthening the spleen. It is not clear how long Si Jun Zi Tang can be effective, but it is mainly related to the type of disease, the severity of the disease and the individual patient’s condition, and it is usually effective after 1-3 days. Four Jun Zi Tang is an ancient formula composed of four herbs: Radix et Rhizoma Ginseng, Radix et Rhizoma Glycyrrhizae, Poria, and Atractylodes Macrocephala, the main effect of which is to benefit Qi, warm Yang, and regulate Qi deficiency in the spleen and stomach. If the patient’s symptoms are mild, taking Si Jun Zi Tang for the right symptoms can generally improve the effect in a week or so, depending on the individual. If the patient suffers from spleen and stomach qi deficiency, the patient needs to follow the medical advice and take the medicine for a long time to be effective. Patients are advised to visit the Chinese medicine department of a regular hospital to have their treatment and dosage formulated by a professional herbalist according to their individual constitution for the best results. If there is no spleen or stomach qi deficiency, it is best not to take Si Jun Zi Tang. In addition, pregnant and lactating women, or women with frequent constipation or fire should not take Si Jun Zi Tang, and those with poor gastrointestinal function should take it with caution.