They're all over the TV predominantly using students as victims trying to stay awake to study. I've heard these kind of solutions for studying for finals ect.. for years, and never understood the concept.
When I was in college, and even the Academy, if I had an important test, or event coming up, I nixed hanging out, and studied, and went to bed at a reasonable hour. I didn't need a drug of unknown origin to keep me awake.
I remember seeing truckers in the old days so pilled up they'd reach 3 or 4 times trying to get a cigarette out of their mouth, and think, they're driving an 80,000 pound truck down the road, and can't find their own mouth.