narcolepsy
"I was first prescribed Adderall XR 15mg in 2009. I was so fatigued that I was falling asleep driving to work. This medication helped immediately; I took it first thing in the morning, and it would give me a burst of energy. All of a sudden I was able to focus, and I stayed calm and rational amidst the craziest chaos at work. I absolutely loved the way I was when I took Adderall. I always took a break from it on weekends to prevent my body from building a tolerance too soon. That it would happen I had no doubt about; but I wanted to enjoy it as long as possible. (If you know the movie "Limitless", then you know what I'm talking about).  I was still me, just better. Alas, I had to up my dosage to get the same effect. Now at 60mg."