Vardenafil is clinically used for the treatment of erectile dysfunction, and the duration of its effect is usually about 6 to 10 hours. Vardenafil can promote the relaxation of vascular smooth muscle and increase the blood flow to the cavernous body of the human penis, and is mainly used in the treatment of male erectile dysfunction. The duration of efficacy of this product is about 6 to 10 hours, which may vary due to the different physical condition and rate of drug metabolism of each individual. Common adverse reactions of this product include dizziness, headache, indigestion, nasal congestion, etc. It is contraindicated for those who are allergic to this product, those who are taking nitrate drugs, those with severe hepatic impairment, and those with end-stage renal disease requiring dialysis. It is recommended to consult a physician before using the drug and take the drug according to the doctor’s instructions.