Impotence is a male problem. It is also known as "erectile dysfunction". To solve it Cenforce is used. This medicine contains sildenafil citrate. Sildenafil is a drug that belongs to the family of phosphodiesterase type 5 (PDE5) inhibitors. This class of drugs inhibits the production of cyclic guanosine monophosphate (CGM), an enzyme that is needed for the production of erections. Sildenafil citrate acts on the smooth muscle tissue in the body to relax, allowing for an erection to form. It also increases circulation, causing arteries to open and fill with blood more easily.