What is the maximum single dose of epinephrine (1:1000) for adult anaphylaxis?

What is the maximum single dose of epinephrine (1:1000) for adult anaphylaxis?

• A. 0.5 mg
• B. 1.0 mg
• C. 0.3 mg
• D. 0.15 mg

Answer: (A)

For adult anaphylaxis, the upper limit for a single intramuscular dose of epinephrine (1:1000) is 0.5 mg. This dose provides the rapid alpha- and beta-adrenergic effects needed to open the airway, reduce swelling, and support blood pressure, while staying within a safety range to limit serious side effects like severe tachycardia or hypertension. If symptoms persist after 5–15 minutes, a second dose can be given per protocol, but the dose per injection should not exceed 0.5 mg. The other amounts reflect pediatric dosing (0.15 mg) or lower adult dosing that isn’t the maximum (0.3 mg), or exceed typical single-dose recommendations (1.0 mg).

For adult anaphylaxis, the upper limit for a single intramuscular dose of epinephrine (1:1000) is 0.5 mg. This dose provides the rapid alpha- and beta-adrenergic effects needed to open the airway, reduce swelling, and support blood pressure, while staying within a safety range to limit serious side effects like severe tachycardia or hypertension. If symptoms persist after 5–15 minutes, a second dose can be given per protocol, but the dose per injection should not exceed 0.5 mg. The other amounts reflect pediatric dosing (0.15 mg) or lower adult dosing that isn’t the maximum (0.3 mg), or exceed typical single-dose recommendations (1.0 mg).