In pediatric epiglottitis/croup, what is the nebulized epinephrine dose?

• A. 0.3 ml Nebulized epinephrine
• B. 3 ml Nebulized epinephrine (3 mg)
• C. 10 ml Nebulized epinephrine
• D. 1 ml Nebulized epinephrine

Answer: (B)

Nebulized epinephrine is used in pediatric croup and epiglottitis to rapidly reduce airway mucosal edema through vasoconstriction, which helps to open the airway quickly. The standard single-dose approach is to give a total nebulized volume of 3 mL. This is typically achieved by delivering a small amount of racemic epinephrine (commonly 0.5 mL of a concentrated solution) and diluting it to reach a final volume of 3 mL for the nebulizer. The goal is a quick onset of relief (often within 10–30 minutes) with effects that last about a couple of hours, so the patient remains under observation for potential rebound symptoms.

That’s why the 3 mL total nebulized dose is the best choice: it reflects the established single-dose regimen used in practice and in many guidelines. Other options that propose markedly different volumes don’t align with the standard single-dose approach and wouldn’t provide the typical rapid, clinically meaningful improvement in airway edema after a single administration. After administration, monitor for side effects such as tachycardia or hypertension, and be prepared for potential repeat dosing if symptoms persist.