Vardenafil acts as an active ingredient in the drug Vilitra 20, while Vilitra 20 is used to treat erectile dysfunction when a man is suffering from erectile dysfunction. Vilitra 20mg is taken 1 hour before having sex, Seek medical advice before taking Vilitra 20 Mg. Take Vilitra 20 Mg once in 4-5 hours, if you are taking more drugs than prescribed by the doctor, you are likely to be moved to the hospital.