YES!! This happened to me. I was put on Klonopin for mild anxiety I was having while my thyroid was getting balanced. It had the opposite effect. Gave me horrific panic attacks and anxiety. Kept me up. It was yucky. I was only on it for two weeks on a very low dose even. My dr. told me to go ahead and just quit since it was such a short time on it and such a low dose. It has been four days and now I am going through withdrawal. It is amaizng how quickly your body becomes addicted. I'm sticking it out though because I want this junk out of my body. I'm sure in a few more days to a week or two I will feel better. Never go on it again. I must be extremely sensative to it because it did the same thing to me. DId you go off it and have withdrawal symptoms??