Hi. I had similar experience, but not as bad, when I took Xeldox for the 1st time. Part of the problem was my pdoc put me on too high a dose. But yeah, I reacted similarly. For you, may have been the dose or just that it's not suitable for you, or may have just been your body getting used to it. Either way, I hope you sought professional help. Please keep us posted on how you go.