I'm surprised that you didn't mention
amphetamines. A lot of kids in High School- and I'm guessing College too- use
Adderall to cram for exams.
Sometime last year, my psychiatrist prescribed
Vyvanse to improve my performance in High School. The conversation was pretty much, "How have you been?" Fine. "How is school?" Sucks.
...And so forth.
Just some info. on what the drug is (as opposed to Addy.): Vyvanse is Dexedrine (or Dextroamphetamine) combined with L-lysine, an essential amino acid... which essentially means that Vyvanse is most effective when swallowed normally.. therefore is difficult to use recreationally. So, you swallow it and dextroamphetamine is released in your body for about nine hours. Basing that time-frame from experience.
I am physically addicted to Vyvanse. I have built a tolerance for it and if I quit taking my normal dose, I feel like sleepy sh*it.
Mentally.. total Love/Hate relationship. Hate myself on it, can't see myself without it. Hahaha... (If you have any more questions, feel free to ask. I'm obsessed with amphetamines. Never taken a chem. class though, so I can't help you there.)