In pediatric severe asthma (2nd bundle), what is the maximum epinephrine IM dose per kilogram?

• A. 0.1 mg/kg with max 0.3 mg
• B. 0.001 mg/kg with max 0.3 mg
• C. 0.02 mg/kg with max 0.5 mg
• D. 0.01 mg/kg with max 0.3 mg

Answer: (D)

The key idea here is weight-based dosing of intramuscular epinephrine in pediatric severe asthma, with a safe per-dose ceiling to prevent excessive exposure. The recommended approach is 0.01 mg of epinephrine per kilogram of body weight, with a maximum of 0.3 mg per dose. This dosing provides enough beta-2–mediated bronchodilation to relieve bronchospasm while limiting potential side effects from too much epinephrine, such as tachycardia or hypertension. For example, a child weighing 15 kg would receive 0.15 mg, a 25 kg child 0.25 mg, and once a child reaches 30 kg or more, the dose caps at 0.3 mg.

Why the other options aren’t ideal: dosing as high as 0.1 mg/kg would deliver a much larger dose than needed for most children and quickly approach or exceed the safe maximum, increasing risk of adverse effects. A dose of 0.001 mg/kg is far too small to produce meaningful bronchodilation in an acute severe asthma episode. A dose of 0.02 mg/kg could exceed the safe per-dose limit for heavier children unless the cap is adjusted, making it inconsistent with established guidelines. The 0.01 mg/kg with a 0.3 mg max strikes the right balance between efficacy and safety across the pediatric weight range.