The active ingredient named vardenafil is found in the vilitra 20 tablet. Used to treat men suffering from erectile dysfunction. The effect of this drug lasts for 4 to 6 hours. And if you want to see the good effect of this medicine, take vilitra tablet one hour before sexual intercourse. Take this medicine orally with water but not with beverages like alcohol as it reduces the effect of this medicine. Consult a doctor before using this medicine. So, you do not see any side effects of this medicine.