DOBUTAMINE HYDROCHLORIDE CAS NO.49745-95-1

Dobutamine hydrochloride is a catecholamine that acts as a β-adrenergic receptor agonist with potent positive inotropic effects in vivo. It has its strongest effects on β1 receptors, with lesser but significant β2 receptor activation and only weak α1 receptor actions. As a result, it strongly increases cardiac contractility with modest chronotropic, arrhythmogenic, and vascular side effects. It is also a polyphenolic antioxidant and can inhibit all human carbonic anhydrase isoforms with Ki values near 1 ?M.

Dobutamine hydrochloride is a direct-acting inotropic agent whose primary activity results from stimulation of the beta-receptors of the heart while producing comparatively mild chronotropic, hypertensive, arrhythmogenic, and vasodilative effects. It does not cause the release of endogenous norepinephrine, as does dopamine. In animal studies, dobutamine produces less increase in heart rate and less decrease in peripheral vascular resistance for a given inotropic effect than does isoproterenoL