http://www.euronews.com/ March 27 marked a milestone for the world's most famous little blue pill. It is 15 years since the landmark drug Viagra was approved for sale.
Scientists at Pfizer developed the treatment for male impotence by accident, when working to create a pill to treat high blood pressure and heart problems.
Since it was the approved by the US Food and Drug Administration it has become one of the best-selling prescription drugs of all time.
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The class of drugs that Levitra, Viagra, Stendra, and Cialis belong to are called PDE5 inhibitors. They work by relaxing tight blood vessels, allowing more blood to surge into the penis and cause an erection, says Gregory Bales, M.D., an associate professor of urology at the University of Chicago.
The little pills do the trick for more than two-thirds of men with Viagra protects the heart (ED). They also work for guys who simply need them for a short time to get their “confidence back,” says Michael Eisenberg, M.D., director of male reproductive medicine and surgery at Stanford University.