Vilitra 20 contains vardenafil, which is used to treat erectile dysfunction (ED). It typically starts to work within 30 to 60 minutes. For the best effect, it should be taken on an empty stomach, as a heavy meal might delay its absorption. The effects of Vilitra 20 can last for about 4 to 6 hours, though this can vary among individuals. If you experience any severe side effects or have concerns, contact your healthcare provider promptly.