My doctor recently started me on Vyvanse after I was off it for a while. Before when I took it, I was much better in terms of my ADD. I did have some mild tremors and didn't sleep as long as I used to. But I wasn't bothered much by these side effects... certainly not as much as I was when I wasn't taking it and couldn't complete the simplest task, got lost driving in familiar places, and had an accident in my car because I lost my focus. I also have been sleeping almost all the time! The original Vyvanse worked great. But this stuff is like taking nothing! I'll tell the doctor. But I would like to know the difference and why you felt the need to create a new formula. My doctor didn't tell me that there had been a change. And I kept taking it and thinking that she was giving me a placebo!