Viagra (sildenafil), a prescription medication that enhances the quality of erection, 비아그라 구매 was first introduced onto the U.S. market by Pfizer in 1998, 비아그라 먹는법 becoming what wags described as the first purely recreational drug to gain approval from the FDA. The name "Viagra" is a portmanteau synthesized from "Niagara" and "vigorous", intended to carry co...