Vyvanse is a fairly new ADD/ADHD drug, I think meant to be the replacement to Adderall. I've been lucky enough to try it several times and I think it's very good. It's just dextroamphetamine with a lisine group added, and while I don't quite know what that means, I don't really like the lisine group. It makes the stuff absorb more slowly into the body somehow. Anyway, it's basically just like Adderall, but it has a bit more of a body load to it, especially on the comedown. Come down is pretty bad, but if you smoke a bowl or two, it becomes the complete opposite. The stuff was made for bud. Anyhow, I don't recommend doing it often, but I like it. Anyone else tried it at all?