Si-Yi Tang is both a proprietary Chinese medicine and a traditional Chinese medicine formula. Taking proprietary Chinese medicine as an example, generally speaking, no special contraindications are needed during the taking of Si-Yi Tang. However, it should be decided according to the patient’s own condition. Siyi Tang is composed of epiphyllum (made), dry ginger and roasted licorice. It has the efficacy of warming the middle and dispelling cold, restoring yang and saving the rebelliousness (saving fainting and unconsciousness by warming and replenishing yang qi). It is used for treating Yang deficiency, cold sweating, fainting (unconsciousness, accompanied by cold limbs, even to the elbows and above the knees), and diarrhea (loose stools mixed with indigestible food), etc. It is also used for treating fainting. The adverse reactions and contraindications of Si Yi Tang are not clear, drug interactions may occur if used concurrently with other drugs, please consult your physician or pharmacist for details. If you need to use Si Yi Tang, it must be used under professional medical supervision.