Tadalista 20 is used to treat erectile dysfunction. It contains an active ingredient called tadalafil which helps a man to achieve erection easily. This medicine shows its effect only if the man is in a state of arousal. This drug can only be used by men over 18 years of age.Tadalista 20 is used to treat erectile dysfunction. It contains an active ingredient called tadalafil which helps a man to achieve erection easily. This medicine shows its effect only if the man is in a state of arousal. This drug can only be used by men over 18 years of age.