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. This wonderful trait of the substance was remarked by “Pfizer” scientists and they began new testing with sildenafil. It was quickly defined as a medicine for people who have erectile dysfunction. The given name was “Viagra” that determined the strength of Niagara Falls and the word power itself in marvelous mixture. With the help of our business firm you can simply purchase viagra online. The researchers determined to corroborate “Viagra” capability to amend erection in 1993 when continuous clinical researches have begun. The efficacy of “Viagra” was conformed during its researches. They conformed the quality of impotence treatment and high safety of the medication. “Viagra” was approved after all the tests by FDA in the US on March 27 1998. They tested the remedy on three thousand people from nineteen to eighty seven years old worldwide and the consequences were amazing. The prolongation of the erectile dysfunction was at the average 5 years and the dysfunction was of inherent, psychic and combined nature. As a result “Viagra” showed marvelous results of efficient restoration of erectile function that have diverse origin. It showed marvelous outcome in coitus of a great number of sick persons. But we should say that there is no such a medication in the world that can assist everyone in all situations. Sildenafil is not a panacea. It helps a vast majority of people who perceived it but still there are some who couldn't do anything with their problem. If you want to get rid of the erectile dysfunction, call us and we'll assist you in it.