Vilitra 20 is a medication used to treat erectile dysfunction (ED) in men. It contains Vardenafil, which is a PDE5 inhibitor, and works by increasing blood flow to the penis, allowing men to achieve and maintain an erection when sexually aroused. Vardenafil, the active ingredient, works by blocking the PDE5 enzyme in the penis. The PDE5 enzyme can restrict blood flow, which is a contributing factor to erectile dysfunction.