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Dobutamine Beta-1 Inotrope — FRCA Primary MCQ

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EasyPharmacology - CardiovascularDobutamine Beta-1 InotropeFRCA Primary

Dobutamine acts primarily at which receptor?

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Correct answer: B — Beta-1 adrenergic

Dobutamine is a synthetic catecholamine that acts primarily as a beta-1 agonist with some beta-2 and alpha-1 activity. The net effect is increased contractility (positive inotropy) with mild vasodilation. It increases cardiac output without significant tachycardia at moderate doses. It does not act at dopamine receptors.

Reference: Peck Hill Williams 2014 Pharmacology for Anaesthesia and Intensive Care