I was at the end of an MRI session when the doctor asked for one ...

I was at the end of an MRI session when the doctor asked for one more picture. They inserted an IV and dripped in Prohance and stuck me back in the MRI machine. Within a minute I was sneezing uncontrollably, continuing to sneeze for about two minutes. My throat felt very rough, my ears burned. When they took me out of the machine, my voice (normally a bass speaking voice) was at least an octave higher and sounded frayed and pretty much shot. I also was very dizzy. They hastily pulled out the Prohance tube and started feeding me Benadryl via IV. I had no more sneezing and started feeling better, but the dizziness continued. Fortunately, a friend was with me to drive me home. The dizziness lessened over the next several hours, and my voice slowly returned to normal. But it was at least 12 hours before I felt really normal.