Adderall speeds your brain up, xanax mellows you out. If you want the
adderall energy, it would probably be better to lower
dosage or cut out xanax altogether rather than continually upping the adderall. Your bp may be a bit raised on adderall anyway, no need to put excess pressure on your heart by making it work against a downer like xanax. Also possible that the initial side effects of prozac (which usually go away within a week or 2) may be diminishing adderall's effects as well.