When I first started taking it, I took the reduced dosage recommended on the bottle. I also reduced my caffeine intake by drinking coffee that was a mix of half decaf half regular. I found that by dropping my caffeine intake, I did not get that nervous feeling. I also found that I had more energy and it was nice because it didn't feel like a caffeine high.

I am now using Xenadrine again to try to get some more definition. I did not cut my caffeine intake this time and have experienced some gas pains and nervousness. I have stopped taking it this week and will go back on it in a few days, but this time I will reduce my caffeine intake. I really think that is why I experienced the discomforts. I am feeling very drained while not taking it, but I also think that is due to the fact that I never cut my caffeine intake in the beginning. I will let you know the results.

I do recommend this product over Hydroxycut. I have taken that before and found that my workouts seem to go better while using Xenadrine rather than Hydroxycut. I seem to work up a better sweat with Xenadrine.