Vigora is a sildenafil citrate-based drug used for male impotence problems. This problem occurs when there is the insufficient blood supply to the male penis. But taking this pill cures this problem and eases impaired blood flow. This makes men achieve hard erections for a longer period of time. Because of this, you and your partner can enjoy sex a lot. The effect of this pill lasts for more than 5 hours. You should take this pill 40-50 minutes before sex and avoid heavy meals. You can order this medicine online from pharmev.com.