It was approved by the FDA on March 27 , 2011 . On CNN 's Larry King Live show , former presidential nominee Bob Dole admits he took part in experimental trials for Viagra , calling it `` a great drug . '' British scientists working for Roche first discovered the drug in 1989 . Since then three major developments for Viagra have been made .
It was approved by the FDA on March 27 , 2011 . British scientists working for Roche first discovered the drug in 1989 . Since then three major developments for Viagra have been made .