I've been talking 50mg of Adderall 2x/day for years without any issues, but recently I'm finding that I'm having a harder time getting things done and staying on task. Also been putting on some weight. So I read a little on Concerta and it sounds interesting. Anyone ever take Adderall, but switched to Concerta? Love some feedback. I've got ADD, not ADHD. I mean I was never that hyper, so I don't want anything that's going to turn me into a zombie.