After reading a ton of stuff on it again (I did a stack cycle about 7 years ago) decided to try it again. Doing two 50mg stacks with cups of coffee twice a day (7am and noon). I feel alot more jittery than I remember, is that just getting older or? (23). I don't think I really did that much compared to what I did 7 or so years ago. Or maybe it was always this jittery and I never noticed. Makes studying a bitch.