Cenforce 200 is an oral medication which treats Erectile dysfunction(ED). Sildenafil, a PDE5 inhibitor, is the active component of Cenforce 200mg . During sexual stimulation, PDE5 inhibitors relax muscles and increase blood flow to the penis. It is recommended that Cenforce tablets be taken half an hour to an hour before sexual activity. This could facilitate both a prolonged time of bed rest and an erection. An erection typically lasts four to six hours, however some people say it can last longer. This time frame depends on the dosage and the speed of effect.