A generic version of Viagra will be available on Monday (Dec. 11), and it will cost half the price of the "little blue pill." Pfizer, which makes Viagra, will produce its own generic version of the drug, which contains the active ingredient sildenafil, according to the Associated Press. The generic will be white rather than blue, and it will cost around $32 a pill, half Viagra's price. By selling its own generic version, Pfizer will be able to compete with other drug companies that can start selling sildenafil as soon as Monday, when Pfizer's patent on the drug expires, the AP said. Here are five interesting facts about Viagra (sildenafil): When researchers first created sildenafil in the 1980s, it was intended to be a treatment for angina, or chest pain caused by reduced blood flow to the heart, according to a 2004 review article. However, in an early trial, the drug did not produce the heart effects the researchers had hoped for. 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In fact, the history of creation of Viagra is quite curious. Literally, an amazing remedy for erectile dysfunction appeared accidentally. Initially, scientists tried to invent a medicine that will cure people with serious heart diseases. On the other hand, Viagra is not the first drug with an unexpected effectiveness. Maybe you remember that once approximately the same happened with antibiotics. Almost a century ago in Britain a mold was found, which quickly and easily destroyed different types of bacteria. Researchers studied the properties of that mold, and discovered penicillin. Impotence treatments are, in a sense, nothing new – they have been around at least as long there have been medical texts to testify about their existence. Yet, their effectiveness is a completely different story altogether. Throughout much of history, ED treatments were found in the shape of herbal remedies, spells and magic amulets, so one can say their effectiveness was… Once medicine progressed enough to recognize that supernatural forces don’t have much interest in ordinary man’s erectile dysfunction, medical experts of the time turned to other causes. But, even then, the root cause of ED problems was assumed to be rooted in psychological issues, not physiology. It sounds odd from this perspective, but it was only in the late 1980s and early 1990s that scientists actually got interested in searching for physiological causes of impotence. The story of Viagra, at least in a stricter sense, starts in the 1990s in the picturesque little town of Sandwich, Kent, in a Pfizer’s research facility that was determined to develop a new pharmaceutical compound that could treat hypertension and angina pectoris, while preventing blood clots. Once a safe and seemingly suitable substance named sildenafil (originally, compound UK/92,480) was discovered, Ian Osterloh, a British clinical researcher employed at Pfizer decided to begin the first phase of clinical trials in Morriston Hospital in Swansea, Wales. At first, the results were discouraging since effects sildenafil had on angina were negligible. Sildenafil history Viagra A history of the little blue pill - The Washington Post, The history of creation of Viagra. Viagra Information Website. Valacyclovir 500 mg side effects Xanax with methadone Tadalafil walgreens How to order lexapro Horizon uncovers how drug design owes more to serendipity than careful design and their potential may only be discovered when we take. BBC News - Viagra and other drugs discovered by accident Sildenafil citrate - Nature Sildenafil History OnlineDrug☀ Here are five interesting facts about Viagra sildenafil. Viagra was originally intended to treat chest pain. 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