Hello all. This is my first post on here. Let me tell you about the negative experience I've gone through while using Hydroxycut Black Onyx. This happened four months ago. I started taking the pills on a daily basis, 1 pill per day, however I wasn't necessarily working out every day. The seventh day I took the pill, I was on a rush to get to work and didn't even eat breakfast...When I got to work I stupidly forgot that I had not had breakfast, and on top of the pill I'd already taken, I had a cup of coffee like it was just a glass of water. I chugged it. Stupid me, after 10 of that my heart started pounding at around 150 BPM, but it felt super hard on my chest, I couldn't walk because I was so short of breath. I was taken to the ER, where docs ran exams on me, and told me that it was only the effect of the excessive caffeine intake, and the yohimbe extract that comes with the pill... I went home feeling dreadful, like I was about to pass out, but didn't. The doctors told me that the effect would pass in a few days... four months later, I've suffered with insomnia, palpitations ALL DAY, shortness of breath, dizziness (I've learned to control my breathing... I was prob hyperventilating) and most of all faintness... just very weak. I actually have earned weight since then because I can no longer work out, otherwise I get short of breath real quickly. I've done all sorts of medical exams, and all come out... NORMAL. I'm weary of this, and to top it all off, work sucks; which I think may be adding more stress to my situation already. I wonder if any of you have gone through the same/similar experience. My doctor told me this was a serotonin imbalance, and wanted to get me on drugs...but I said NOPE. So here I am, dealing with this naturally, but geez it is real hard to cope with. I just want to go back to normal again, I've never been an anxious person, so this is all new to me. Thank you for your time. Pablo.