On this day, 27 years ago, March 31, 1998 (March 4, 1998, the lunar calendar),"Viagra" was launched on the market. "Viagra" In March 1998,"Viagra" began its journey of conquering the world. "Viagra", whose English name is Viagra, is a light blue, diamond-shaped aphrodisiac tablet. Since it was launched on the market in March 1998, in less than a few months, a "Viagra craze" has been set off around the world. Italians named a blue sunglasses "Viagra". Restaurants in Sicily also name a flavor of pizza "Viagra". Some countries, such as Mexico, Brazil and Thailand, have approved Viagra to improve the quality of life in their countries, and when Viagra's maker, Fuaizar Pharmaceuticals, consulted the Vatican Church on Viagra, the Church blessed Viagra because the Church believed that Viagra could improve family life and couples 'relationships. The market price of "Viagra" is US$10 per tablet, but it costs US$20 to 50 on the black market. Prices vary from place to place. For example, each tablet costs US$77 on the black market in Hong Kong, but it is cheaper in India, US$25, but it is equivalent to a month's salary of an Indian. The Japanese went to Hawaii specifically and spent US$1379 on 60 "Viagra" tablets. But Viagra also has side effects, which is why many countries ban its sale. The manufacturer of "Viagra" announced that "Viagra" may bring side effects such as "headaches, blue eyes, dizziness, and priapism". Especially if "Viagra" is mixed with other drugs, it may also bring life-threatening risks. Not long ago, American media announced that 10 to 20 people in the United States had died from taking Viagra. But many men are not deterred. "Viagra" patent expires. The mysterious and expensive blue pill Viagra bids farewell to its monopoly. The reporter learned from pharmaceutical giant Pfizer yesterday that its star product Viagra (commonly known as "Viagra") has quietly expired in May 2012. As the main drug for the treatment of ED(erectile dysfunction), the global market is basically dominated by Pfizer's "blue" Viagra, Lilly's "yellow" Ciali, and Bayer's "orange" Alita. Viagra has the most market advantage in China and the largest share in segments. In 2012, sales in China exceeded 1 billion yuan. It is understood that after the expiration of the "Viagra" patent, since May 2012, local generic drugs in South Korea have appeared one after another. Currently, there are 37 types of Viagra generic drugs produced in South Korea. Sales volume of South Korea's domestic product Sialis has leapt above Viagra, occupying first place in the market. "Preliminary work such as marketing and branding of the Baiyunshan version of 'Viagra' is being done. Currently, the drug is waiting for approval by the State Food and Drug Administration, and the production capacity and marketing team are making preparations. "Yesterday, the relevant person in charge of Guangyao Baiyunshan told this reporter. It is understood that the "hand-in-hand" target of Guangyao Baiyunshan's research and development of the drug is the Nobel Prize winner and father of Viagra. Murad, and the synthetic process of Baiyunshan version of "Viagra" has also obtained national patents, so this move has attracted much attention from the industry. Pfizer discovered Viagra Pfizer was founded in 1849 and has a history of more than 160 years. Headquartered in New York, USA, it is currently the world's largest R & D based biopharmaceutical company. In 1991, while developing a drug to treat heart disease, Pfizer's scientific team unexpectedly discovered that the drug was more effective in treating male erectile dysfunction. In March 1998, Viagra, a drug for the treatment of male sexual dysfunction (hereinafter referred to as ED), with sildenafil as the main ingredient, was sold as a prescription drug in the United States. Viagra was subsequently listed in many countries and regions, and since then, it has brought more than US$1 billion in sales revenue to Pfizer every year.