VIDALISTA 20 MG The active medical ingredient present in Vidalista 20mg is tadalafil and it is widely used for erectile dysfunction treatment and many other health problems in men. Vidalista 20 mg is a drug of choice for many men who suffer from erectile dysfunction. Tadalafil salt is the main and the only ingredient in Vidalista. It helps relax the muscles in the blood vessels and hence increases the flow of blood throughout the body.