Amphetamine / dextroamphetamine
"I was on Adderall XR 20 mg for about 6 months, and then developed hives.  Could've been the bottle, could've been a delayed reaction (sulfa allergies).  I don't know, but it was perfect until then. Decreased appetite, yes, but that's not negative as far as I'm concerned.  Doc switched me to Vyvanse XR, and I can tell you that while you will focus, it's not as focused as when on Adderall (at least for me).  Decreased appetite but nothing like with Adderall.  I've also been on Evekeo (10 mg) tablet.  I've only tried that once, and while it will definitely stimulate you (closer to Adderall), I find there's really not hyper focus.  Just a lot of movement and staying awake.  If you haven't tried it yet, I would go with Adderall XR first."