Yes, I had a reaction but it wasn't real severe, but it was severe enough. I got very nauseous and felt really sick and dizzy. But I came on Ask (here) and asked about it and someone advised me to drink lots of water and I was better in about 4 hours.
I had one about 10 years ago and I tossed my cookies right after the scan with contrast. Since then I have only had X-Rays and MRI with contrast and only one out of the 3 times did I have the same reaction. everyone is different . good luck ! !