narcolepsy
"I thought Nuvigil was good, but Adderall is amazing.  It helps me feel almost human, again.  Not only does Adderall keep me awake, but it clears up some of the mental fog caused by Narcolepsy.  Cataplexy is also not as severe when I'm on Adderall.  I can finally focus at work, I have enough energy to take care of myself and my family, and I'm doing so well at work that I got two raises in the last 3 months!  The irony is that you have to be well-rested for it to work; otherwise, it does absolutely nothing.  I have also started devoloping a tolerance so it starts to wear off after about 3-4 hours, but I take another dose and it gets me through the rest of the day."