Popular male impotence medication Vidalista 20 mg online has the active ingredient Tadalafil as its main ingredient. It contains 20 mg of Tadalafil, a PDE-5 Inhibitor that increases male sex desire. This impotence medication is also known as Generic Cialis because it contains Tadalafil. Male impotence, often known as Erectile Dysfunction (ED), affects millions of men worldwide.