I have a 6yr old son, has been taking focalin XR for 6 days. his weight is 83 lb and 50.5 inches, he is so big for his age, first four days we gave him 5mg as directed but we saw no change no difference, then we call doctor and indicated to double the dose to 10mg. on the fifth day, and surprisely the tracher called us amazed for his behevoir and conduct, he was so focused and concentrated, we were so happy for that, but the sixth day we gave him 10mg again and simply no effect again, he came back to his previous attitude, no interested jumping every were and protesting everything. of course I will talk to the doctor but anyone knows if this is normal?, should I wait a little bit more to have results?