MRI contrast reaction

I recently had an MRI 9 years after my last one. I am currently on Tecfidera and i seem to have had an allergic reaction to the contrast used in the scan. A day after i cam out in a rash and red blotchy patches. This didn’t happen last time but i was on Rebif then so am wondering if the reaction is due to the tecfidera.

Has this happened to anyone else?