"i am prescribed adderall xrs. i am only on 30 mg once a day and my dr won&#039;t increase it. the medication definitely makes me motivated, have energy, and feel a nice since of well-being. i am concerned with a few side effects i get almost every time. i get numb on the left side of my neck and in my shoulder. i also get really cold feet and my toes look purple with very slow capillary refill. i also already had a sleep problem before all this, so my nights are always pretty restless."