The most effective medication for men to treat sexual dysfunction is vilitra 40 tablet. This medication is used to treat erectile dysfunction and impotence. Men over the age of 18 are the only ones who use this drug. Vardenafil, an ingredient in this medication, helps men achieve a strong erection during sexual activity. This medication can be taken either before or after a meal. This medication takes up to 3 to 6 hours to take effect. Consume this medication with water; do not crush or chew the tablet. Follow your doctor's advice when taking this medication.