concerta b vs vyvanse

Sounds like you mean ADHD-impulsive? What's your son diagnosed with, anyhow? Generally, ADHD is one of those things where all that matters is what works for YOUR child. What works for another kid with pretty much the same symptoms won't necessarily work for your kid, or if it doesn't work for the other kid, it still could work for yours (within the range of normally used ADHD meds, of course, and both Concerta & Vyvanse are normally used ADHD meds)