I read this thread with interest and wasn't going to reply.
However, after reading another thread on doing what works for you and your body, I decided to put in my 2 cents.
I've been using Hydroxycut for about 15 months. I take at least a 2 week break after every bottle is completed and never, ever use anywhere near the recommended maximum dose. I've never had any ill effects and my blood pressure is lower than it was 15 months ago. It definitely gives me energy and added willpower with my diet. Whether or not this is a psychological, not physical effect could be argued all day long.
Anyway,I just wanted to share MY experience.
And another FYI, the latest issue of Fitness RX had a terrific article on the efficacy of caffeine/ephedra supplemets, as well as the politicizing that's gone on regarding their availability/safety. It's a very though provoking article. Also both Muscle and Fitness and MF Hers have recently published scientific study results regarding these supplements.
Of course, I recommend that anyone considering using these supplements or considering their use to make sure and follow the dosing guidelines and warnings very carefully. I also think that informing your physician of your intentions is critical.
Just, my opinion and my experience!