Viagra introduction

Viagra is an effective drug to treat male erectile dysfunction. Its English name is sildenafil (translated as Sildenafil, sildenafil, sildenafil), its trade name is Viagra (translated as Viagra, Viagra), and the prescription drug in China is Viagra. 1 sildenafil citrate (trade name: Viagra) is the world's first oral drug developed by Pfizer to treat erectile dysfunction (ED). 2。 1998 was listed in the United States in March, and the word Viagra first spread in Hong Kong and then entered the mainland. In July, 2000, Viagra was approved as a prescription drug in China with the name of Viagra. In September, 20001year, China National Intellectual Property Administration approved the patent use of Viagra in China, and in May, 2004, it was allowed to retail in pharmacies. According to media reports, the word Viagra has been generalized from "Viagra" specifically referring to Pfizer to "a drug for treating sexual dysfunction". Pfizer, USA and Guangzhou willman Pharmaceutical Co., Ltd. have conducted many civil and administrative lawsuits on disputes related to Viagra trademarks. Finally, Guangzhou willman Pharmaceutical Co., Ltd. obtained the trademarkNo.191818 "Viagra".