Even though sildenafil is only available by prescription from a doctor, it was advertised directly to consumers on US TV (famously being endorsed by Bob Dole and Football star Pele'). Numerous sites on the Internet offer Viagra for sale after an "online consultation", a mere web questionnaire.
Sildenafil (compound UK-92,480) was synthesized by a group of pharmaceutical chemists working at Pfizer's Sandwich, Kent research facility.
Sujet: Very interesting 
