The Chinese Pharmacopoeia stipulates that the dosage of XuanShen decoction is 9~15g, and the specific dosage should follow the doctor’s instruction. Xuan Shen was first published in Shen Nong Ben Cao Jing (Classic of the Materia Medica of the Divine Husbandman). It is slightly cold in nature, sweet, bitter and salty in taste, and belongs to the lung, stomach and kidney meridians. Its basic effects are clearing heat and cooling blood (relieving blood heat by clearing heat), nourishing yin and lowering fire (nourishing yin essence and lowering fire), and detoxifying and dispersing knots. It is mainly used in treating heat entering the camp and blood (the degree of invasion of heat into the body is deep and the symptoms are heavy), body heat at night, warm poisonous spots (warm, hot and poisonous evils invade the body resulting in spots and plaques on the skin), heartburn and insomnia, bone evaporation (the feeling of heat transmitting outward from the bones), cough caused by labor (cough caused by prolonged coughing or laboring to the lungs), heat disease and injury to yin, carbuncle sores and swelling and poisoning. The adverse reactions and contraindications of Xuan Shen are not clear. It is not suitable for people with deficiency of spleen and stomach (spleen and stomach weak and cold), and with little food and loose stools (thin and unformed stools). This product should not be used with quassia. If you need to use the medicine, you should consult your doctor first and use it under the doctor’s guidance, do not blindly self-medicate.