Times can vary as to when meds start taking effect. Depends on ones own physiology etc.. It does take some time to adjust the dose as well. Stick to it and let the doctor know exactly what your observations and concerns are with each evaluation. He needs your input to help him help you. And good luck with it...I have an appointment in a couple of days to see about starting Concerta. I'm looking forward to it helping but realize like any med, finding the right dose and the right drug may take some time. If Adderall doesn't do it for you one of the alternatives [Strattera/conerta etc] may. Good luck again!