Lock Yang has curative effect on premature ejaculation caused by insufficient kidney yang and deficiency of essence and blood, but the efficacy of single drug is limited, and other drugs should be paired, the specific use of drugs need to follow the doctor’s instructions. Lockyang has the effect of tonifying kidney yang, benefiting essence and blood, and lubricating the bowels. Lockyang, sweet flavor, warm nature. It belongs to the liver, kidney and large intestine meridians. It is used for kidney yang deficiency, essence and blood deficiency, lumbar and knee impotence, impotence and spermatorrhea, intestinal dryness and constipation. It is used for treating kidney deficiency and impotence, weakness of waist and knees, often used in conjunction with cow’s knee, wolfberry, cornelian cherry, etc. For treating kidney deficiency and spermatorrhea and impotence, it can be used in conjunction with dragon bone, Cistanchiakovia, cuttlebone and other medicines. In addition, for the treatment of weak yang and essence deficiency, yin failure and blood exhaustion, dryness of the large intestine, constipation and non-transportation, it can be used in combination with condensed honey, or with medicines such as Cistanches, Fire Flaxseed, and Cypress Seed, etc., which are beneficial to essence and blood and lubricate the intestines and laxatives. It is forbidden to be taken by those who have deficiency of yin and fire (deficiency of yin and essence in the body and hyperactive fire), deficiency of spleen and diarrhea, and constipation with solid heat. Long-term consumption can also cause constipation.