Cenforce 200 belongs to the class of PDE 5 inhibitors. It contains sildenafil citrate, which improves blood circulation in the body, including the p*nis. A PDE 5 enzyme attacks the body of patients with erectile dysfunction, preventing proper blood circulation. This narrows the arteries and blocks the walls of the p*nis. As a result, no blood reaches the p*nis and no erection occurs. The Sildenafil Citrate in the drug relaxes the walls of blood vessels, allowing more blood to enter the p*nis. The pressure increases as the blood flows. This causes an erection for 4-5 hours.