Epinephrine 1:10,000 has which primary actions?

Epinephrine 1:10,000 has which primary actions?

• A. Analgesia
• B. Sedation
• C. Vasodilation
• D. Bronchodilation, positive chronotrope, positive inotrope

Answer: (D)

Epinephrine at this concentration acts on both beta and alpha receptors, driving actions that are most useful in acute care. The beta-adrenergic effects on the heart increase rate (positive chronotropy) and force of contraction (positive inotropy), while beta-adrenergic effects in the lungs cause bronchodilation. These three effects—bronchodilation, faster heart rate, and stronger heart contractions—are the primary systemic actions you’re testing. Vasoconstriction via alpha receptors also occurs and helps raise perfusion pressures during CPR, but the option that lists bronchodilation with the heart’s increased rate and contractility reflects the main intended actions. Analgesia or sedation are not actions of epinephrine at this dose, and vasodilation is not the primary vascular response here.

Epinephrine at this concentration acts on both beta and alpha receptors, driving actions that are most useful in acute care. The beta-adrenergic effects on the heart increase rate (positive chronotropy) and force of contraction (positive inotropy), while beta-adrenergic effects in the lungs cause bronchodilation. These three effects—bronchodilation, faster heart rate, and stronger heart contractions—are the primary systemic actions you’re testing. Vasoconstriction via alpha receptors also occurs and helps raise perfusion pressures during CPR, but the option that lists bronchodilation with the heart’s increased rate and contractility reflects the main intended actions. Analgesia or sedation are not actions of epinephrine at this dose, and vasodilation is not the primary vascular response here.