Sildenafil citrate present in Cenforce is a potent PDE-5 inhibitor. It inhibits the action of PDE-5 enzyme present in abundance inside the penile region. This inhibitory action prevents the degradation of an endogenous substance known as cGMP. This substance produces relaxation of smooth muscles and dilation of the blood vessels inside the penile region. The dilated blood vessels improve the amount of blood reaching the penile organ. An adequate amount of blood supply enables a man to have a firm and strong penile erection.
The action of Cenforce can be seen within 30 to 60 minutes post oral consumption. Its effect persists for about four to five hours on an average. A major part of this medication is excreted via feces, while some part is eliminated via the urine.