Tadalista is a medication used to treat erectile dysfunction (ED) in men. The active ingredient in Tadalista is Tadalafil, which belongs to a class of drugs known as PDE5 inhibitors. It works by increasing blood flow to the penis during sexual arousal, allowing men with ED to achieve and maintain an erection. Tadalafil, the active ingredient, inhibits the enzyme PDE5, which regulates blood flow in the penis. By blocking PDE5, Tadalista helps cGMP (a substance that dilates blood vessels) remain in the body longer.