Who makes Viagra?
Sildenafil (compound UK-92,480) was synthesized by a group of pharmaceutical chemists working at Pfizer’s Sandwich, Kent research facility.
It was initially studied for use in hypertension (high blood pressure) and angina pectoris (a form of ischemic cardiovascular disease).
Pfizer therefore decided to market it for erectile dysfunction, rather than for angina. The drug was patented in 1996, approved for use in erectile dysfunction by the Food and Drug Administration on March 27, 1998 , becoming the first pill approved to treat erectile dysfunction in the United States
