Viagra is a blue pill which can work in as little as 14 minutes for many men.
Viagra was originally developed as a compound to be trialed as just another medication for blood pressure and hypertension, not much excitement there really. However, it was in clinical trials that the scientists at Pfizer realized something that would change the course of sexual history worldwide; the side effects of this medication were that impotent men were getting erections.
Viagra, along with sexual stimulation, helps achieve, better & long-lasting erection. It works usually for 4 hours long enough for prolonged sexual satisfaction.
An estimated 15 million to 30 million men in the United States experience chronic erectile dysfunction. So this medication is a boon to such patients.