IV epinephrine is indicated in which situation?

• A. Mild allergic reaction
• B. Stable blood pressure
• C. Localized swelling
• D. Profound hypotension or nonresponse to IM epinephrine and fluid resuscitation

Answer: (D)

In severe allergic reactions, the route of epinephrine is guided by how well the patient’s circulation is holding up. Intramuscular epinephrine is the go-to first-line treatment, but when someone has profound hypotension or does not respond to intramuscular epinephrine plus fluid resuscitation, intravenous epinephrine becomes appropriate. The IV approach is given as a carefully titrated infusion under close monitoring to rapidly restore blood pressure and organ perfusion. It carries higher risks—hypertension, arrhythmias, ischemia, and tissue injury if it infiltrates—so it’s reserved for this extreme, life-threatening scenario in a controlled setting.

Milder situations—such as a mild allergic reaction or localized swelling with stable blood pressure—don’t require IV epinephrine; intramuscular administration suffices and is safer in those cases.