Four Substances Tang is a traditional Chinese medicine formula that should be taken according to the doctor’s instructions, so there is no such thing as when Four Substances Tang is suitable for drinking. Four Substances Soup is mainly composed of white peony, Sichuan Angelica sinensis, Radix Rehmanniae Praeparata, Rhizoma Ligustici Chuanxiong and other Chinese herbs, which have the effect of tonifying and regulating blood, and can be mainly used for treating the syndrome of deficiency of blood in the camp and blood (blood deficiency in the body), which can be seen in the form of dizziness and dizziness, palpitations, insomnia, lack of blushing color, or menstrual disorders of a woman with scanty menstruation or menstruation closure, and pain in the umbilical cord and abdomen, and so on. Its contraindications and adverse reactions are not clear. However, the time and manner of taking the prescription should be decided by the doctor according to the condition, so there is no such thing as the appropriate time to take it. Patients should take the prescription according to the doctor’s instruction and should not change the time and dosage of the medicine at will.