"my 9 year old son has been on various medicines for adhd since he was 6. we just switched to focalin 10 mg about 2 weeks ago. we are noticing that by about 1:00 in the afternoon it is completely out of his system and there is no focus. we are going to try a booster dose of 5 mg in the afternoon. i&#039;m going to talk to our doctor about lowering his morning dose because he feels shaky and tired, which i thought would have subsided by now. his focus is terrific but i wonder if we can get the same results by knocking down the dose a bit and adding the booster. other than that, his sleep and eating habits are the same. whew!"