I am bipolar and an addict. Here last year I was perscribed adderrall and it eventually caused my addiction and illness to spin out of control. Being bipolar I even have to monitor my caffeine intake because when mania hits anger and depression isn't far behind. The caffeine or amphetimines speed up our thought process and increase our emotions. Other words mad turns into rage, sad; depression, and happy; extremely manic
If your friend was taking much too much adderall,it's possible that she created a temporary medication psychoses, but of course that is only one possibility, and your observations ought to be shared with her doctor.