question: My ten yr old son has been on vyvanse for approximately 4 weeks. He seems to have become more anxious and has displayed moments of anger. This is not his general behaviour. He has a computer at school and today he was so angry he threw it on the ground.....very odd for his to do this. He is on vyvanse for in attentiveness at school. Can you tell me if this behaviour. Could be as a result of vyvanse Thank you Michelle