Vilitra 20 is used to treat impotence and erectile dysfunction in men. The drug contains an ingredient called vardenafil which helps to increase blood flow to the penis tissues of a man. This drug helps men to know a strong erection during intercourse. Take this medicine one hour before intercourse. Take this medicine once in 24 hours. You can also take this medicine before or after a meal. This drug is only taken by men over 18 years of age. The effect of this medicine lasts for 4 to 6 hours. Take this medicine as advised by your doctor.