Cenforce D interferes with the production of a hormone called PDE5. It relaxes the blood vessels surrounding the penis to allow more blood flow during s*xual arousal. By using Cenforce D, men can easily get and maintain a hard erection after being s*xually stimulated. You will only get an erection after being s*xually aroused and the erection will go away on its own. Even if you have had erectile dysfunction problems for a long time, Cenforce D will start working immediately.