The effects of Vilitra 20 can last for about 4 to 6 hours, providing a window of opportunity for physical activity. Like other medications in the same class, Vilitra 20 requires physical stimulation to be effective. It does not cause automatic erections; arousal is necessary for the medication to work. It is typically taken about 25 to 60 minutes before anticipated physical activity. https://www.genericday.com/vilitra-20-mg.html