The active ingredient in Filitra 20, Vardenafil, works by inhibiting the PDE5 enzyme, which is responsible for breaking down cyclic GMP (a substance that promotes the relaxation of smooth muscle and dilation of blood vessels). By inhibiting this enzyme, Vardenafil helps to increase blood flow to the penis, leading to improved erectile function. Unlike some other ED medications, Filitra 20 tends to work more quickly, with effects typically starting within 30 to 60 minutes of ingestion. Its effects can last for up to 4-5 hours, giving men the ability to engage in sexual activity within this timeframe without needing additional doses. https://www.genericday.com/filitra-20-mg.html