The Chinese Pharmacopoeia prescribes that Mudanpi should be decocted and taken 6~12g each time, the exact dosage is determined by the doctor according to the individual’s condition, and the doctor should be consulted before the use of the medicine. Peony Danpi is bitter in taste and cold in nature, and enters the blood (the deepest stage or disease site among the four periods of Wei Qi and Ying Blood in warm-heat diseases), with the effect of clearing heat and cooling the blood (relieving blood heat by clearing heat). It can be used in warm-heat diseases in which heat enters the camp-blood (the degree of invasion of heat evil into the body is deep and the symptoms are more serious), forcing the blood to move uncontrollably, resulting in purplish spots, epistaxis and vomiting of blood. This product is pungent and bitter, long in clearing congestion in the blood veins, and is suitable for dysmenorrhea and amenorrhea, bruises and injuries, and other cases of blood stasis. Mudanpi is cold and pungent in the blood, good at clearing and penetrating the ambient heat in the yin, suitable for the late stage of warm disease, when the heat is in the yin and the yin fluid has been injured, with symptoms such as nocturnal fever and early coolness, and no sweating when the heat subsides. The adverse effects of Mudanpi are not clear, blood deficiency with cold, menorrhagia and pregnant women should not take. Drugs must be used under the guidance of a doctor, do not blindly self-medication, so as not to delay the condition.