Dexedrine
"My experience is limited since I have only been on this medication for a few days.  I am a medical resident, diagnosed with ADHD at 32. Got sick and tired of my mediocre performance at work. Tried Straterra, Viibryd and Wellbutrin, nothing worked. Just started on Dexedrine 5mg 2-3 times a day. My first day on it, I studied all day until midnight. I was so motivated, I felt great, on top of the world, I was so driven. I noticed an immediate difference in my performance at work and it made me a nicer, less cynical. The bad thing was insomnia, teeth clenching, some nausea, decreased appetite and the drop in my mood once it wore off. I am worried about intolerance which is driving up my anxiety level. "