I agree it's not good for my heart. I keep my caffeine intake considerably lower now, always less than the 400mg max that the FDA recommends, usually less than that.

I'm not sure that adderrall is significantly healthier for the heart. I did take it for a bit but I found adderral to be unbelievably terrible. I would take a small dose at like 7am, and I still would have trouble getting to sleep at night, and when I did get sleep it didn't feel terribly restful. I was only on it for about a week and that was enough.

Obviously if it works for you, don't let me take that away from you.