Contrast reaction prophylaxis

12 hours prior to exam: Prednisone 50 mg PO

6 hours prior to exam: Prednisone 50 mg PO

1 hour prior to exam: Prednisone 50 mg PO AND Diphenhydramine 50 mg PO

12 hours prior to exam: Methylprednisolone 32 mg PO

2 hours prior to exam: Methylprednisolone 32 mg PO

1 hour prior to exam: Diphenhydramine 50 mg IV/IM/PO (optional)

15-30 minutes prior to CT: Methylprednisolone 125 mg IV push AND Diphenhydramine 25-50 mg IV push

Every 4 hours until procedure: Methylprednisolone 40 mg or Hydrocortisone 200 mg IV

Immediate pre-procedure: Diphenhydramine 50 mg IV