Cenforce 100 mg blue pill has a functioning compound called Sildenafil Citrate. Sildenafil treats erectile dysfunction by hindering the action of phosphodiesterase type-5, a substance that is normally present in the penis. While participating in sexual action, Sildenafil Citrate helps with broadening (unwinding) the veins. Thusly, there is an expansion in the volume of blood coursing through the penile region of the body. This system helps men in getting and keeping a strong erection.