Vilitra 20 treats erectile dysfunction by relaxing the muscle tissue of blood vessels and increasing blood flow to the genital areas. This medication contains vardenafil, which aids in obtaining an erection. This tablet is to be taken 30 to 60 minutes before sexual activity. Overdoses of this drug should be absolutely avoided. The erection period is usually 4 to 5 hours. Take this medicine with a sufficient amount of water, and do not chew or crush the medicine.