Yes, Cenforce is a PDE5 (phosphodiesterase type 5) inhibitor. It contains sildenafil citrate as its active ingredient, which works by blocking the PDE5 enzyme. This enzyme is responsible for the breakdown of cyclic GMP (cGMP), a substance that helps relax the smooth muscles in the blood vessels of the penis. By inhibiting PDE5, Cenforce increases cGMP levels, allowing blood vessels to dilate and improve blood flow to the penis, which aids in achieving and maintaining an erection in individuals with erectile dysfunction (ED). Cenforce functions similarly to other sildenafil-based medications, such as Viagra.