The indications of Lock Yang Solid Semen Pills and Sildenafil Citrate Tablets are different, and there is no obvious contraindication to their simultaneous use, so they can be taken at the same time. It is recommended that patients take the medication regularly according to the doctor’s instructions after clarifying the cause of the disease under the guidance of the physician. Lock Yang Essence Fixing Pill, mainly composed of lock Yang, Cistanchis, Morinda citrifolia, Boneset, Cuscuta chinensis, Cortex Eucommiae and other drugs, has the effect of warming the kidney and fixing the essence, and is often used in the waist and knee soreness and weakness due to insufficient kidney yang, dizziness and tinnitus, spermatorrhea and premature ejaculation and other disorders. It should not be taken by patients with cold and fever; during the treatment period, abstinence from sexual intercourse is recommended. Sildenafil citrate tablets are suitable for patients with erectile dysfunction, because of its short half-life, so it is recommended that it should be taken 0.5 hours – 1 hour before sexual activity. It should not be combined with nitrates and should not be used by people who are allergic to it, severe liver injury, history of heart attack and patients with low blood pressure.