Dobutamine is a direct-acting parenteral sympathomimetic inotrope. It primarily acts as an agonist at beta1-adrenergic receptors (with minor beta2 and alpha1 stimulatory effects) to increase myocardial contractility, stroke volume, and cardiac output. Unlike dopamine, it does not stimulate dopaminergic receptors or release norepinephrine. It has comparatively mild chronotropic, hypertensive, arrhythmogenic, and vasodilative effects, and minimally affects pulmonary vascular resistance.

Primary Indications & Clinical Dosing:

• Low Output States: Used for short-term treatment of cardiac decompensation due to depressed contractility from organic heart disease, cardiac surgery, congestive heart failure, cardiogenic  ...