adhd
"Incredible.  I was on Adderall for over a year.  My doctor switched me to Vyvanse four days ago.  Since day one, I have felt better than ever.  That "nervous-jittery feeling" (perfect description) as well as anxiety and teeth-grinding that I had while on Adderall is totally gone.  I feel "normal". I am able to concentrate and focus calmly, and am no longer plagued by excessive energy.  I feel healthy, and everyone around me has noticed the positive difference in such a short amount of time."