On North American soil? Are you sure, Trab? Either way, there are way more drugs now than back in the golden age. They just took a ton of what they had at their disposal.
I'll dig a little, I'm pretty sure it was around from 1960 by Syntex...
I think its a Oldie. Early anemia drug. A lot of politics involved in getting rid of it and replace w/ much more expensive EPO.
Oh, well Cyclists need dope to.

Also remember, the stuff was about as regulated as selling shoes back then, and these guys had a lot of Intnl
competitors as friends. Also, Border/customs in those day was likely close to a cake walk.
Shit, It'd just be, "Whats that medicine?". No big deal.