What to do After Your Reaction to Intravenous Contrast Dye

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This information explains what to do after having reaction to the type of intravenous contrast dye checked below:

Magnetic resonance imaging (MRI) contrast:

☐  Gadopentetate dimeglumine (Magnevist®)

☐  Gadobenate dimeglumine (MultiHance®)

☐  Gadoxetate disodium (Eovist®)

☐  Gadobutrol (Gadovist®)

Computed tomography (CT) scan contrast:

☐  Iohexol (Omnipaque 300)                        

☐  Iohexol (Omnipaque 350)                    

☐  Iodixanol (Visipaque 320)

What You Should Do Today

☐  You are being sent to the Urgent Care Center or local Emergency Room.

☐  You are able to go home after your study.

  • Go to nearest emergency room or call 911 if you:

    • have difficulty breathing

    • feel short of breath

    • have chest pain

  • Call the doctor who ordered this scan if you have any new or concerning symptoms.

☐  You were given diphenhydramine (Benadryl®), which may make you sleepy.

  • Do not drive yourself home.  We will help make arrangements as necessary.

  • Go to the nearest Emergency Room if you have sudden sharp eye pain or difficulty urinating.

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​​What You Should Do Before Your Next Radiology Exam with Contrast

Tell all your healthcare providers that you have this reaction. We have entered the contrast listed above as a reaction in your medical record at MSK.

For future ☐ CT scan ☐ MRI studies with contrast, follow the instructions checked below:

☐  Your reaction was a side effect of the contrast, not an allergy. We will take steps to minimize the side effect the next time you have this contrast.

☐  Your reaction was a mild allergic reaction. You do not need to do anything differently before your next scan.

☐  Your reaction was a moderate allergic reaction. You need to take medications before every (check one) ☐ MRI ☐ CT scan you have with contrast. Your primary doctor will give you a prescription for a steroid medication and possibly diphenhydramine (Benadryl®). You will need to start taking these medications the day before your scan.

☐  Your reaction was a serious allergic reaction. You should not receive contrast before your next (check one) ☐ MRI ☐ CT scan without talking with your doctor about your allergy.

If you have any questions, call _____________________ and ask to speak to a nurse.

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