The only problem that I found with Adderall is that it does keep you up which can be a good thing & bad thing. Good when it helps you to stay awake at the right time but is a bad thing when you can't even go to sleep when it is time.

Adderall is used for ADD/ADHD as well as Narocolepsy

I have actually takin Adderall (both 15 & 20mg (not at the same time of course)) on a few different occasions & no not 4hrs later or even 15hrs later did I crash or become even the slightest sick to my stomach nor did I need to or have the urge to binge (that's crazy)! Adderall gave me energy, made me not get too hungry & kept me awake. I did eat though but only about 1/4 of the amount of food that I would normally eat because as I said…. Adderall made me feel not so hungry & when I did begin to feel more hungry I ate ( I didn't eat all of my food of course (like I said just about 1/4 of it) because I wasn't a whole lot hungry to begin with).

I also took it right before I took the ACT during the Summer. It made me literally enjoy the long-ass test more than anything. I was humming tunes in my head as I filled in bubbles to the rhythm. It really helped me focus, and I got a very good score on the ACT because of it.

That said, it also completely screws up your desire to eat anything. I'm not surprised people use it to lose weight. For me, I still felt hungry, so I piled a bunch of food up for lunch. However, once I actually had it front of me at the table, I felt nauseated.

Crazy stuff.