The four reverse soup can not be long-term drink. Four reverse soup contains appendicitis, appendicitis is toxic, can not be used for a long time or large doses, so patients can not drink four reverse soup for a long time, patients with the need to take in the Chinese medicine practitioner under the guidance of the discernment of the use of the disease in the disease (for medicinal properties of the drug is fierce, the disease should be discontinued after the bulk of the healing, so as not to cause damage). In addition, this product should be avoided by pregnant women, patients with yin deficiency and internal heat, solid heat in the body, and dampness and heat. Si Reverse Tang is composed of Radix Psoraleae, Radix et Rhizoma Glycyrrhizae and Radix et Rhizoma Glycyrrhizae. It has the efficacy of warming the middle Jiao and dispelling cold (dispelling cold by warming and tonifying the Spleen and Stomach), restoring Yang to save the body (saving syncope and unconsciousness by warming and tonifying Yang Qi), and it is suitable for patients with Yang deficiency who want to get rid of their body, cold limbs (limbs that are cold, even cold up to the elbows and above the knees), diarrhea, and cold sweating out of the body. Adverse reactions such as abdominal pain, nausea and vomiting, dizziness, rash, itchy skin, etc. may occur after taking the medicine and need to be stopped immediately. Do not consume raw and cold food during the period of taking the medicine. It is necessary to use Si-Yi Tang under the guidance of a professional Chinese medicine practitioner’s diagnosis, and should not be used blindly for a long period of time.