Penis erection is the flow of blood into the penis during arousal. If the penis receives a good supply of blood the penis would become rock-like hard and erect or else no matter how much you are excited the penis remains loose.

When Cenforce 200 mg or more accurately Sildenafil Citrate dissolves in the blood it eases the tissues of the penile region and walls of the blood vessels of the penis. Overall a situation is produced where the blood faces no obstruction in reaching the penis. And along with all this PDE5 (phosphodiesterase type 5 is made non-functional. Usually, PDE5 slows the erection by letting the blood exit from the penis, this is a normal process after ejaculation.