Cenforce 50mg promotes vasodilation by acting on the blood arteries of the penis. This is accomplished by blocking the Phosphodiesterase type 5 (PDE 5) enzymes, which break down cGMP and hence regulate blood flow.

Inhibition of PDE 5 causes an increase in blood flow to the penis, which aids in the maintenance of an erection for longer periods of time. After taking the Cenforce 150mg medication, the erection can last up to 4 hours.