My neurologist changed my medication since the Concerta wasn't helping much and I was already at the top dose for my weight. I've been on Concerta for as long as I can remember. What should I expect that's different about Vyvanse? I had a higher dose of Conserta (at the very top of my weight rage) and he's starting me with a middle of my weight range dose for the Vyvance. I'm 18 and have been been taking things for my ADHD since I was 4, and been on Concerta since I was 8. And is Vyvance a stronger medicine?