Sildenafil is mainly used for the treatment of erectile dysfunction in men, and the effect of its use is that it can improve the erectile state, but it may also have adverse reactions such as dizziness. Sildenafil is a type 5 phosphodiesterase inhibitor, mainly used for the treatment of erectile dysfunction in men, taken one hour before intercourse, the drug can be made effective after sexual stimulation during intercourse, which can improve the erectile state of the penis, maintain better erection hardness, and improve the quality of sexual life. However, taking sildenafil may also cause adverse reactions such as low blood pressure, dizziness and visual abnormalities. In addition, it should be noted that the drug is prohibited to be combined with nitrate drugs, and it is contraindicated for women, those who are allergic to the product, children, and those whose recent cardiovascular status makes them unfit for sexual life. The drug is a prescription drug, it should be used in strict compliance with the doctor’s instructions, and any discomfort should be treated by a doctor in time.