Men who suffer from male erectile dysfunction (ED) produce the enzyme PDE5 in their bodies, which hinders the production of gas that is vital for maintaining good erections.Each tablet of Vilitra 60 mg orVilitra 20is a source of the active ingredient Vardenafil which could be an PDE5 inhibitor.The oral tablet containing an PDE5 inhibitor reverses actions that occurs within the PDE5 enzyme, and assists with the creation of cGMP as well as gas in the body.The cGMP generated dilates blood vessels as well as the smooth muscle in the sexual organ, resulting in the flow of gas and blood during sexual stimulation. It also makes natural erections possible.