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What is Viagra? According to medical statistics, every man has experienced erectile dysfunction at least once in his life. While in the past erection problems have been treated with mountain rhino powder and herbal extracts, since 1998 men have had a little blue helper called Viagra. Viagra is the trade name for a drug manufactured in the United States by the pharmaceutical company Pfizer. Sildenafil is the international non-proprietary name of the drug and the active ingredient of the product sold in pharmacies in a package labeled "Viagra". Pharmaceutical giant Pfizer has synthesized the active ingredient of Viagra, sildenafil, in the laboratories of the English city of Sandwich. At first, they thought that the new drug would be used in the treatment of angina pectoris and other diseases associated with circulatory disorders. However, during clinical trials, it turned out that sildenafil solves erection problems much better, and participants in clinical trials did not want to part with the pills. In 1996, Pfizer patented its new erectile dysfunction drug sildenafil, packaged it in blue, diamond-shaped film-coated tablets, and named it Viagra. It is said that the name comes from the words "strength" (strength, energy) and "niagra".