One medication used to treat impotence is the vilitra 20 tablet. For erectile dysfunction, this medication is quite helpful and effective. This medication aids in improving blood flow to men's penile tissues. Vardenafil, an ingredient in this medication, aids men in achieving an erection during sexual activity. Take this medication half an hour prior to sexual activity so that you can enjoy quality time with your partner. This medication can be taken either before or after food. Follow your doctor's advice when taking this medication. This medication has a 36-hour half-life.