This composition is about “Viagra” and some other remedies for the persons who would like to have cialis. The discovery of sildenafil became the third greatest discovery in medicine after the finding of X-rays and penicillin. It was made under the name of “Viagra”. A Nobel Prize was awarded for the researches of penicillin and X-rays. This prestige prize was given to chemists that discovered sildenafil in autumn of 1998. The history of sildenafil has started in 1992 in Pfizer's Sandwich, where “Pfizer” corporation had its researches. Sildenafil citrate was a new medical matter and the chemists made tests with it. They tried it as a drug from different cordial diseases. The first purpose of the new remedy anticipated to be in increasing the blood pressure in cordial muscle by the way of diminishing arterial pressure. But after several researches it was ascertained that sildenafil doesn't have the expected result on the cordial muscle blood pressure the same as on the arterial pressure. But in the same moment scientists noticed that masculine patients who participated in the experiments didn't want to return the medicine back. All the patients had the same motive for saving the medication with them. Everyone was saying about the betterment of the erection grade. Thereby sildenafil induced the evident blood inflow to masculine reproductive organs, in spite of the minimum influence on the blood circulation in cordial muscle. This marvelous feature of the remedy was remarked by “Pfizer” scientists and they started new experiments with sildenafil. It was rapidly recognized as a medicine for persons who have erectile dysfunction. The given name was “Viagra” that meant the power of Niagara Falls and the word power itself in marvelous mixture. With the help of our business firm you can simply buy cialis online. In 1993 long medical researches that were needed for corroboration of “Viagra” features have started. As a result the tests have conformed high efficacy of “Viagra” for impotence treatment and its high safety. “Viagra” was approved after all the tests by Food and Drug Administration in the US on March 27 1998. The effect of the medication was tested on three thousand of men from 19 to 87 years old in all over the world. The continuation of the erectile dysfunction was at the average five years and the malfunction was of organic, psychogenic and mixed origin. The results of these experiments display that “Viagra” is effective for the restoration of erection. The grade of copulation was heightened by the method of “Viagra” usage. And you are to realize that it won't help surely everyone. There is still no such a remedy that can be useful for all people worldwide. It helps a majority of people who tried it but still there are some who couldn't make something with their disease. Our online source may not just suggest you various remedies but also compare cialis vs levitra.