Vidalista 40 improves the motion of nitric oxide and will increase the blood flow in the corpus cavernous by vasodilation and it also selectively inhibits the interest of the enzyme Phosphodiesterase 5. Nitric oxide relaxes the blood vessels in and around the penis and enhances the blood glide to it. That is answerable for inflicting an erection. On the other aspect, the enzyme phosphodiesterase 5 works as an antagonist to this movement, so it reasons loss of erection.