Vilitra works in plenty the equal way as the ordinary Levitra tablet, although with a quicker onset of action. When a male turns into aroused, the physique starts to launch Cyclic GMP, a substance that strikes thru the blood and reasons the blood vessels in the penis to dilate. As a result, extra blood enters the penis and an erection occurs. Then, an enzyme known as Phosphodiesterase Type 5 (PDE-5) comes into effect, breaking down the degrees of Cyclic GMP so that they can be eliminated from the body. This motives the blood vessels in the penis to return to their regular size, and the penis to return to a soft, flaccid state.