My son is 13 years old and has been on vyvanse since July 2010. I have notice and had other people tell me that he has been in his own little world and when you talk to him he is looking at you but you can tell by that look he is off in another world. He has been what you call having anger issues in his basketball practices which they are not until 7:30 at night ( I just wondering if the medecine has worn off) or is it because it is his hormones changing . He is taking 50 mg of Vyvanse. Should I contact his pedatrician about this? Hope to hear from you.