When a man is sexually stimulated, Cenforce 200 mg helps relax the blood vessels in the penis, leading to improved blood flow and the ability to achieve an erection. It works by inhibiting PDE5, an enzyme that breaks down cGMP, a substance that regulates blood flow in the penis. By inhibiting PDE5, Cenforce 200 mg enhances the effects of nitric oxide, which relaxes the muscles and dilates blood vessels, allowing blood to flow into the penis more easily.