I am prescribed 50mg Vyvanse for my ADD and when I run out of Norco taking Vyvanse keeps me from feeling like shit. The only thing it doesn't help with is sleep(of course, it's a frickin stimulate). I don't feel 100% but I am able to work, go to school and be productive w/o feeling like I'm dying. I was just curious as to why this was and if anyone else had an experience with a stimulate preventing opiate W/D. I mean, the Vyvanse has no opiate properties. Maybe it just keep the mind busy with another chemical and it doesn't spazz out like it does w/o anything. Any thoughts?