Bulimic Friend Taking Adderall..dangerous???

My friend who is bulimic is taking adderall for adhd. She is about 5'2 and weighs 103lbs. She also drinks a lot and sleeps very little. She recently "fell asleep" at her job and could not be woken up. She was taken to the hospital and told me that she simply was just really tired. I am concerned that her taking adderall combined with bulimia, drinking, and very little sleep is wearing her system way down making her prone to a disaster waiting to happen. Can someone please tell me if adderall could have had this affect on her and what else could possibly happen. She will not admit to me that she has any problems so it is kind of hard to tell what really going on with her. I want to help her out and I am concerned. I would appreciate any advice. Thankyou.