Filitra 10 mg is a medication primarily used to treat erectile dysfunction (ED) in men. The active ingredient in Filitra is Vardenafil, which is a PDE5 inhibitor, similar to Sildenafil (Viagra) and Tadalafil. When a man is sexually aroused, the body releases nitric oxide, which activates an enzyme called guanylate cyclase, leading to the production of cyclic GMP (cGMP). This helps relax the smooth muscle in the blood vessels of the penis, allowing them to expand and increase blood flow.