The topic of our article is to acquaint you with the development of “Viagra” and to assist you buy viagra. There were three most significant findings in the world medicine: X-rays, penicillin and sildenafil. Sildenafil is famous nowadays as “Viagra” and other medical notions. X-ray and penicillin researchers were awarded a Nobel Prize. This prestige award was given to chemists that discovered sildenafil in autumn of 1998. The history of “Viagra” has begun in 1992 in Pfizer's Sandwich, where “Pfizer” company had its tests. A new medical substance sildenafil citrate was under the research of the “Pfizer” chemists those days. They tried it as a remedy from different cordial illnesses. At first everyone thought to apply it for increasing blood pressure in myocardium diminishing arterial pressure in the same time. But it was noticed that sildenafil citrate doesn't have important impact neither on blood circulation in the cordial muscle nor arterial pressure. But in the same moment scientists noticed that masculine patients who participated in the experiments didn't want to return the medication back. Each tested person has one and the same motive why he didn't want to return the medications. The erection quality of those people highly improved. Thereby “Viagra” induced the tangible blood inflow to male reproductive organs, despite the minimal influence on the blood circulation in myocardium. (more…)

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