Viagra is a medication for impotent men and also a trusted friend of men. Viagra was discovered by Pfizer in 1998- 1999. Since then Viagra is the best and trusted friend of men. Impotent men believe that Viagra is the only fellow when they were suffering from impotence. Many new impotence medications were discovered after this drug such as Levitra etc. Levitra is a brand impotence medication produced by Bayer.

Viagra consumers are very satisfied and happy with this drug. Although the generic version of Viagra is also available in the name of Generic Viagra and this generic version is same as like its brand drug Viagra.