The theme of our article is to inform you with the development of “Viagra” and to help you buy cialis. There were 3 most significant findings in the world medicine: X-rays, penicillin and sildenafil. Sildenafil is well-known today as “Viagra” and many different medical names. A Nobel Prize was awarded for the researches of penicillin and X-rays. This prestige reward was given to chemists that founded sildenafil in fall of 1998. In 1992 the discovery was made in Sandwich, Kent, the location where at those times “Pfizer” medical corporation had the lab. Sildenafil citrate was a new medical substance and the researchers made tests with it. They tested it as a drug from diverse heart diseases. The chemists expected that sildenafil citrate would aid the increment of blood pressure to cordial muscle and diminish arterial blood pressure. But it was noticed that sildenafil citrate doesn't have considerable influence neither on blood circulation in the cordial muscle nor arterial pressure. But in the same time scientists observed that male patients who participated in the experiments didn't want to give the medication back. Every patient has one and the same reason why he didn't want to return the medications. Everyone was saying about the improvement of their erection quality. The cause was in the sildenafil effect. It wasn't definitely good in increasing blood circulation within cordial muscle but it extended it in male reproductive organs. (more…)

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