I've found from my experience that any medicine for ADD or depression or anxiety or any condition that involves the way our minds and brains function can have a different effect for different people. While one prescription may be perfect for one person, it may not necessarily work for the next person. Also doses can have different effects and usually the doctor will start with a low dose like the previous poster said. I would suggest that you stay in contact with your daughter's doctor on whether the medicine is working, so her doctor can adjust it as needed. Also, it may take a few weeks for medicines to fully work.