The active ingredient in Vidalista 20mg, tadalafil, is a member of the group of substances known as phosphodiesterase type 5 inhibitors. Its primary action is to improve blood flow in the penis’ cavernous bodies. Tadalafil produces two effects: it stiffens and enlarges the penis while also producing a full, prolonged erection. The administration of the Vidalista 20 tablet should ideally not be followed by the use of energy drinks, alcohol, large amounts of coffee, or fats. It should also not be repeated in less than 24 hours.