2000: Dr. Sanjay Kaul presents analysis on the 49th Annual Scientific Session of the American College of Cardiology that implies 522 patients died whereas taking Viagra in the first yr the drug was in the marketplace.
The drug was patented in 1996, accredited to be used in erectile dysfunction by the FDA on 27 March 1998, becoming the first oral treatment accepted to treat erectile dysfunction in the United States, and offered for sale within the United States later that year.

That's a lot of money - however the figure wasn't even near the real amount spent by the Defense Department for that erectile dysfunction drug and others. I'm certain I miss many useful feedback, as lots of individuals are much less more likely to ship an e-mail than write a comment.
I'll keep saying it till the day I die, or until someone invents something better: non-public conversations through e-mail.