"i have been on adderall(d-amphetamine salts combo)and adderall xr for 3 years (and other brands), starting at 10mgs and over time, due to tolerance, am on 20mgs regular, 20mgs xr, as well as 20mgs dextroamphetamine er (total of 60mgs\day). i must say that the few negative side effects did not last for me, so i eat normal and sleep well.  having figured out the correct dose combination for me has helped in so many ways. now i can concentrate and complete things in a well organized way.  the only issue i&#039;ve had is the difference in the different brands.  "