If the patient’s previous contrast reaction was severe and involved difficulty breathing, facial or neck swelling, or hospitalization; consult with one of the radiologist before scheduling the exam.
For a history of mild to moderate reactions:
- Prednisone – 50mg by mouth at 13 hours, 7 hours, and 1 hour before contrast injection.
- Benadryl – 50mg by mouth, IV, or intramuscular at 1 hour before contrast injection.
