I've been on Adderall XR (10 mg) for about a month now, after switching from Ritalin. I did feel light-headed for the first week or so, and my heartrate would go up more quickly than usual from exercise. Now, I rarely feel light-headed, and the heart thing passed as well.
As for the headache, I know that this can be a side effect as well. BUT you should definitely tell your doctor about this, and not just hope that it will go away--especially if you continue to get headaches. You might need to lower your dose, or you might be having a bad reaction to Adderall in general.
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