The efficacy of men taking deer antler for a long period of time is mainly to tonify kidney and yang, support sores and poisons, benefit essence and blood, and strengthen muscles and bones. Deer antler is a kind of Chinese herbal medicine, taken from the antlers of Sika deer and other male deer, which is warm in nature, sweet and salty in taste, and is attributed to the liver meridian and kidney meridian. Through long-term chronic warming and tonifying the kidney yang (warming and replenishing the kidney yang), men are able to dredge the liver meridian and kidney meridian to a certain extent, treating men’s renal yang deficiency (deficiency of yang qi in the kidneys), sores that have been festering for a long time and do not converge, weakness of the waist and knees, and insufficiency of blood and semen. Deer antler can be used not only by men, but also by women with deficiency and coldness of the flushing and renal meridians (deficiency of yang qi that cannot warm the flushing and renal meridians), and with discharges of menstruation (excessive or spotty menstruation). The adverse effects of deer antler are not clear, but deer antler needs to be contraindicated for those with fever, those with yin deficiency and hyperactivity (deficiency of yin fluid and hyperactivity of yang qi), those with blood division (which is the deepest stage or location of the disease among the four phases of warm disease, Wei qi and Ying qi) who have heat, and those who have high gastric fire or lung heat. During the use of deer antler, you need to avoid combining with aspirin, hypoglycemic drugs, cardiac glycosides, ephedrine hydrochloride and other drugs. Avoid monoamine-rich drinks and foods, cold fruits and melons, such as beer, bacon, pineapple and so on.