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Anesthesia · single question

What is the concentration of epinephrine in an adult EpiPen?

  1. 1:2,000 (0.5 mg/mL)
  2. 1:1,000 (1 mg/mL)
  3. 1:10,000 (0.1 mg/mL)
  4. 1:100 (10 mg/mL)
Show answer and explanation

Correct answer: B. 1:1,000 (1 mg/mL)

Adult EpiPen contains epinephrine 1:1,000 (1 mg/mL), delivering 0.3 mg per injection. Pediatric EpiPen Jr: 1:2,000 (0.15 mg).
  • A. ❌ 1:2,000 is the pediatric EpiPen Jr concentration.
  • B. ✅ CORRECT – Adult EpiPen: 1:1,000 epinephrine delivering 0.3 mg IM.
  • C. ❌ 1:10,000 is the IV cardiac resuscitation concentration.
  • D. ❌ 1:100 would be dangerously high; not used in EpiPens.

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