CAMRT Radiography Practice Exam

What medication is commonly administered after a severe contrast reaction?

1. Asprin

2. Diphenhydramine

3. Prednisone

4. Epinephrine

The correct answer is: Epinephrine

In the case of a severe contrast reaction, epinephrine is the medication typically administered as it acts quickly to counteract anaphylactic reactions. It works by constricting blood vessels, which increases blood pressure, and by dilating air passages in the lungs, making it easier for the patient to breathe. This rapid action is critical during severe allergic reactions, which can lead to anaphylaxis characterized by symptoms such as swelling, difficulty breathing, and a drop in blood pressure. While other medications like diphenhydramine can help manage mild allergic reactions or provide relief from symptoms such as hives, they do not act swiftly enough to address life-threatening conditions. Prednisone is often used for its anti-inflammatory properties in treating allergic reactions but is generally not utilized in acute situations due to its delayed onset of action. Aspirin is not used in this context; it's primarily used for pain relief or as an anti-inflammatory and does not address the acute symptoms of a severe contrast reaction. Therefore, epinephrine is the essential choice for immediate treatment during severe contrast media reactions.