I've had muscle and body twitching for 3 years after my CT Scan with iodine injection. Immediately after my CT Scan with iodine my body started twitching. I thought it was anxiety, due to the fact it was after midnight and I had trouble sleeping as it was. I've had muscle body twitching, hypnic jerking, teeth grinding & chattering and insomnia since then. My doctor thinks that the reaction should have stopped by now. I really don't know what I have or what to do. I've already had thryoid blood tests and an EMG done.