What is the typical infusion dose range for dobutamine in adults?

• A. 2.5-20 mcg/kg/min
• B. 0-30 mcg/min
• C. 5-10 mcg/kg/min
• D. 50 mcg/min

Answer: (A)

Dobutamine is a beta-1 inotropic agent given intravenously and dosed by body weight in micrograms per kilogram per minute, with careful titration to reach the desired increase in cardiac output. The standard, widely used range is 2.5 to 20 mcg/kg/min. This means you typically start at about 2.5 mcg/kg/min and then raise the dose in small steps (for example by 2.5 mcg/kg/min every 10 minutes) until you achieve the targeted hemodynamic effect, usually up to around 20 mcg/kg/min. For a patient weighing 70 kg, that translates to roughly 175 mcg/min at the low end up to about 1,400 mcg/min at the high end. The other options don’t reflect the weight-based dosing pattern: one is an absolute total-dose range that ignores body weight, another is a narrower range that may not cover the full therapeutic range, and the last is a single absolute dose that doesn’t account for patient size. The key idea is that dobutamine dosing is individualized and scaled to body weight, with a typical maximum around 20 mcg/kg/min to balance improved contractility against potential tachycardia or ischemia.