Ever wonder who pays for all that drug related odds and ends you see at your doctor's office? Who do you think pays for all those commercials? We all do.
I know a few drug company reps. You wouldn't believe the BS they tell doctors and the pressure to sell.
My guess is that Solvay has a patent on the packaging or something. Add in the fact that T is a controlled substance of sorts with a captive audience desperately in need of it and you see what we have here.