Hello. You might consider there’s more going on here than ADHD. I don’t believe it’s typical for vyvance to cause violent withdrawal symptoms after 5 days use? I’ve taken it on weekdays only for 7 years with no issues. Violent outbursts aren’t a typical ADHD symptom. Perhaps he needs to take some responsibility for his lack of emotional control and anger issues? These rages rarely get better and more frequently, they escalate. Please take a hard, realistic look at the situation—from what you’ve said, he’s a troubled guy… unfortunately, only he can do the work to change that.