Vilitra is a medication used to treat erectile dysfunction (ED) in men. It contains the active ingredient Vardenafil, which is a PDE5 inhibitor. Vardenafil helps increase blood flow to the penis, allowing men to achieve and maintain an erection during sexual activity. The active ingredient in Vilitra is Vardenafil, which works by inhibiting the enzyme phosphodiesterase type 5 (PDE5). PDE5 typically restricts blood flow to the penis, so by blocking this enzyme, Vardenafil allows blood vessels to relax and dilate, improving blood flow to the penis.