“Allergy to scan dyes?”

The chances of being allergic to MRI dye if you are allergic to CT scan dye are uncertain and can vary from person to person. It is best to consult with a healthcare professional for an accurate assessment of your individual risk. To learn more, connect with me at drjeromepuryear.com. Thank you!

Reactions to Iodinated contrast are typically poorly understood. By both the public, and many physicians. True allergies to Iodine based contrast are actually very rare. Allergy to iodine itself is impossible. That being said, the contrast agents used for CT and MR are not related. There is no cross-reactivity. A previous reaction to an iodine-based contrast would not put a patient at any risk, higher than baseline, for a reaction to MRI contrast.

Dyes for a CT and MRI are usually different - however not knowing what your reaction was to it will be hard to give any suggestions blindly. I would advise seeing an allergist to get a proper assessment and recommendations about the potential need for pre-treatment with steroids and antihistamines.