Deer antler blood is the blood extracted from the antler when it is harvested, and its effects are similar to those of deer antler. Deer antler blood is not a regular medicine, and is usually used as a medicine for deer antler. Deer antler has the effects of strengthening kidney yang, benefiting essence and blood, strengthening muscles and bones, regulating the flushing period, and relieving sores and poisons. It is used for symptoms such as insufficient kidney yang (lack of yang energy in the kidneys), deficiency of essence and blood, impotence and slippery semen. Deer antler, sweet, salty and warm in nature. It belongs to the kidney and liver meridians. It is used for uterine cold infertility, lethargy, fatigue (mental weakness), fear of cold, dizziness, tinnitus, deafness, cold pain in the waist and spine, tenderness of the muscles and bones, leakage (excessive menstruation or more than a few drops) with lowering of the belt, and yin gangrene (a general term for a group of slow-acting yin sores and ulcers) without convergence. It is also contraindicated in cases of yin deficiency and hyperactivity of yang (deficiency of yin fluid and hyperactivity of yang qi), heat in the blood (the deepest stage or location of the disease among the four periods of warm disease, namely, Wei qi and Ying blood), fire in the stomach or phlegm in the lungs, as well as exogenous heat diseases. Please consult a medical professional for specific medication.