When a man takes Cenforce 100mg the sildenafil citrate contained in the oral tablet comes into action. Sildenafil citrate, a PDE5 inhibitor, prevents the breakdown of cyclic guanosine monophosphate. The softness of the muscles makes Cenforce 150mg easier for the blood vessels to widen, leading to an increase in blood volume. When a man is aroused, he suffers from erectile dysfunction, which is defined as a severe loss of blood flow to the male organ. In order to generate an erection, a sufficient amount of blood must reach the p*nis. In the absence of sufficient blood supply, a man is unlikely to achieve an erection.