Premedication Protocols for Patients with Previous or Increased Risk for Contrast Reactions
| Premedication | Protocol |
|---|---|
| Corticosteroids (any of the following) | Prednisone: 50 mg orally, 13, 7, and 1 h before contrast injection |
| Hydrocortisone: 200 mg intravenously, 1 h before contrast injection | |
| Methylprednisone: 32 mg orally, 12 and 2 h before contrast media injection | |
| Antihistamine (optional) | Diphenhydramine: 50 mg intravenously/intramuscularly/ orally 1 h before contrast injection |