IMPORTANT NOTE: Any patients requiring Benadryl premedication will need to be accompanied by a driver due to the associated drowsiness from this medication.
What are the IV contrast agents that you use?
We use iodinated contrast for interventional procedures. (Omnipaque and Visipaque)
Which patients receiving IV contrast need premedication?
Patients who have only had vasovagal reactions, nausea, vomiting, or contrast-induced renal dysfunction do not need steroid/antihistamine premedication. These drugs will not prevent or alleviate these symptoms.
Mild Reactions – hives, nasal congestion, itching, mild shortness of breath can be treated at any facility and require the premedication as described below.
Severe Reactions – laryngeal edema, severe shortness of breath, or anaphylactoid response need to be discussed with a radiologist prior to scheduling to determine if an alternative test can answer the clinical question. Procedure location in these instances would depend on the clinical scenario. Call 540-654-9118 to speak to an Interventional Radiologist or Vascular Surgeon.
What about patients with history of anaphylaxis?
Patients with prior severe life-threatening reaction to any substance, other than iodinated contrast, who required hospitalization are recommended to have our standard premedication protocol prior to iodinated IV contrast injection.
Patients with prior anaphylactic reactions to imaging contrast agents (ex: iodinated contrast for CT, gadolinium for MRI) need to be discussed with a radiologist prior to scheduling to determine if an alternative test could be performed. This includes any reaction that required urgent medical care. Call 540-654-9118 to speak to a radiologist.
What is the suggested premedication protocol?
Prednisone: 50 mg by mouth at 13 hours, 7 hours, and 1 hour before contrast media injection; AND
Diphenhydramine (Benadryl®): 50 mg by mouth 1 hour before contrast medium