A Happy, Elderly Couple

Start of Viagra

The earliest step to developing Viagra can be traced back to a scientist called Ferid Murad who discovered that nitroglycerin releases nitric oxide, which causes the relaxation of smooth muscle cells. This discovery that the body produces nitric oxide to regulate blood vessels, helped tremendously in the development of Viagra. Two other scientists, Robert Furchgott and Louis Ignarro, were also involved and they proved that nitric oxide, a colourless gas, since it did regulate blood vessels could be used to treat hear disease and shock. In 1986 Furchgott and Ignarro presented their conclusions on their research that the body uses nitric oxide to transmit signal that control the bodyís blood vessels. In 1998 these three scientists won the Nobel Prize for Physiology and Medicine, for their discoveries.