Vilitra 20 mg is a medication used to treat erectile dysfunction (ED) in men. It contains vardenafil. Vardenafil works by improving blood flow to the penis, helping men achieve and maintain an erection during sexual stimulation. The effects of Vilitra 20 can last for up to 4 to 6 hours, similar to other ED medications. During this time, you can achieve and maintain an erection with sexual arousal. Take Vilitra 20 mg approximately 30 minutes to 1 hour before you plan to engage in sexual activity. However, it’s important to note that the medication will only work when you’re sexually stimulated.