Read the other posts about Strattera on this site. There is a lot of good info there. My DS is also taking Strattera and whenever we up the dose it makes him sleepy for a few days ut then that side effect seems to go away. He takes it at night for this reason. Again, please read the other threads on strattera - it is a tricky med- you must have just the right dose for your weight and it must be ramped up slowly and it usually takes 4 -6 weeks to see full results. I am still trying to figure it all out so I am no expert but there is a lot of good info on this site.
Good luck!