adhd
"When first taking this I experienced a surge of energy in the morning, with a feeling of euphoria that lasted for an hour or so. It was easy to concentrate on one task but very difficult to move from one task to another. 
After an adjustment in the tablet 
15mg - twice a day to
10mg - three times a day I was able to function from morning through evening without the euphoria. It took more than a year to be able to complete a task and move onto another. 
Today, I have some tolerance but the change in behaviors (from negative to positive) has remained to the degree that I would not want to change medications."