The action of Vardenafil 20 mg is identical to that of tadalafil and Sildenafil. It has the ability to control the activity of this enzyme. Vilitra 20 mg stops the activity of this enzyme and improves blood flow to the penis, making it firm and erect. At the same time, the blood vessels that carry blood out of the penis decrease in size and decrease the removal of blood from the penis. Erection can be easily achieved using Vilitra 20 mg. Take this medication at the dosage and for as long as directed by your doctor.