According to Chinese medicine, “failure to perform” belongs to the category of impotence. As Liver-Sparing and Yang-Enhancing Capsule is mainly used for the treatment of functional impotence and mild arterial insufficiency impotence caused by liver-depressing and kidney-deficiency and liver-depressing and kidney-deficiency with blood stasis, it will not appear the phenomenon of “failure to perform” after taking it under normal circumstances. The capsule is composed of Tribulus terrestris, Radix Bupleurum Chinense, Fructus Bupleurum, Rhizoma Dioscoreae, Leech, Cordyceps Sinensis, Fructus Ziziphi, Fructus Cistanches and so on. It has the efficacy of dispersing the liver and relieving depression (treating the disease of depression by dispersing the liver’s qi), invigorating blood circulation and tonifying the kidneys. It can be clinically used in the treatment of functional impotence and mild arterial insufficiency impotence due to liver-depressing and kidney deficiency and liver-depressing and kidney deficiency with blood stasis. Symptoms include impotence, impotence of the penis without lifting it up or lifting it up without firmness, tightness in the chest with a good taiyin, distension of the chest and the ribs, lumbar and knee soreness and tenderness (a feeling of soreness and weakness of the lumbar and knee areas), a pale tongue with petechiae or ecchymosis, and a stringy or fine stringy pulse. The adverse effects of the drug are not known, but it should be used with caution in patients with bleeding disorders. For patients with impotence, it is recommended to go to a regular hospital for consultation and treatment under the guidance of a professional physician to identify the symptoms.