Vidalista 20 is a generic version of Cialis which has the active components tadalafil. It is widely used in the treatment of erectile dysfunction and many other health problems in men. Vidalista 20 mg is a drug of choice for many men who suffer from erectile dysfunction. The Effects of Tadalafil may last for up to 36 hours, and this allows couples to engage in intercourse at a natural time for this reason this Ed Medicine has been given the nickname The Weekender.