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Preventing An Allergic Reaction to Contrast Media

This information will help prevent an allergic reaction to the contrast media you will receive during your scheduled CT scan.

There are many reasons someone could have a reaction to contrast media. Your doctor has decided you need to take medication to prevent or minimize your chance of having a reaction. Most patients take a medication called prednisone. If you cannot swallow pills, tell your doctor. He or she will tell you what to do instead.

You are scheduled to have a CT scan on ____________ at ____________ am | pm. If the time is changed, adjust the times you take the prednisone. The first dose should be taken 13 hours before the CT scan, the second dose 7 hours before, and the third dose, 1 hour before.

  • Your doctor wants you to take 3 doses of prednisone. Take one 50 mg tablet at:

_____ am | pm (13 hours before your CT scan) on____________________(date)

_____ am | pm (7 hours before your CT scan) on____________________(date)

_____ am | pm (1 hour before your CT scan) on ____________________(date)

  • If your doctor wants you take any additional medication or any medication instead, your doctor or nurse will write in the name of it below. Take:

__________________________ at _____ am | pm, 1 hour before you are scheduled to have the CT scan.

Notes

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