How long to drink Epimedium has effect needs to depend on the patient’s condition, and it is difficult to generalize. Epimedium has the function of tonifying the kidney and assisting yang, dispelling wind and removing dampness (dispelling wind and dampness in the body), and can be used for impotence and premature ejaculation, spermatorrhea, spermatorrhea, and lumbar-knee soreness and weakness (a feeling of soreness and weakness of the lumbar and knee) caused by insufficient renal yang (lack of yang of the kidneys) and failure of the vital fire (the weakening of renal yang of the organism, and the decrease in the function of warmth and promotion of the operation of qi and blood). It can also be used for pain in the lumbar and knee joints, unfavorable flexion and extension, and numbness in the limbs caused by wind-cold and dampness. Generally speaking, Epimedium is of limited efficacy when used alone. It can be used together with Cistanchis, Luoyang and Duzong after identification, and the effect will be more obvious. It should be noted that the medicinal properties of Epimedium are warm and hot, therefore it is not suitable for people with yin deficiency and internal heat, or those with fire-heat blazing (exuberant fire-heat evil). Adverse effects are not known. Epimedium is a traditional Chinese medicine, and it is recommended to use it under the guidance of a traditional Chinese medicine practitioner to identify the symptoms, and not to abuse the drug, so as not to take the wrong medicine and damage the body.