Viagra the other options
In the year 1998 Pfizer first launched Viagra, this drug was then the only known treatment for Erectile Dysfunction. With Viagra Pfizer set foot on the uncharted territory of medicines on Sexual disorders. But in the past decade the world of medicine has seen a lot of advancement and now there are a lot of pharmaceutical companies that have researched new medicines. These companies are vying for a share of the market over which previously Pfizer had complete monopoly.