Yup. Nothing worse than having a heart attack while your trying to live right, in fact, its totally non-conducive to living period. Sounds like your really into keeping yourself fit so you probably know what to watch out for. Don't push yourself. Treat it just the same as you would if you were starting to exersize after a long illness when your body is not used to being pushed. I was the same way at first when I started taking Adderall... rapid heartbeat, sweating, but that should taper off within a week or so, if not, get back with your doc. I get a tremendous amount of physical exersize, but when I feel the ticker straining, I back off. Use common sense. (I don't have much, so I borrow it from people who say; "you ok? You look like your having a heart attack dude, your face is all red".
KIDD
is it safe to do cardio exercise while starting / taking stimulants? I usually do 45 minutes of cardio (running, swimming, elliptical, etc.) like 6 days/week and lift weights 2 or 3 days a week as well. I just started taking Ritalin and felt my heart race very uncomfortably, but my doc said it was normal and most people I have heard from here say things like that will wear off in time.