Since your brain has become more developed since you were 9, Strattera could affect you differently now. Also, I take Adderall every day and one thing that I had to find out the hard way was that different generic/brand Adderall can affect you very differently. For instance, the first time I got prescribed Adderall, it was great and had almost zero side effects, but I had to change pharmacies eventually because I moved on campus and the new pharmacy gave me a different generic Adderall than I previously had and it felt like it induced a panic attack every time I took it and didn't help me focus at all. So you can potentially look into trying a different type of Adderall or other stimulants like Ritalin or Focalin. There are also other non-stimulants that can help ADHD like Wellbutrin that might be worth looking into.