After initial fluids, what is the recommended vasopressor first-line for septic shock?

After initial fluids, what is the recommended vasopressor first-line for septic shock?

• A. Epinenphrine
• B. Dopamine
• C. Norepinephrine
• D. Phenylephrine

Answer: (C)

In septic shock, after giving fluids to restore intravascular volume, the goal is to rapidly restore mean arterial pressure by increasing systemic vascular resistance without compromising cardiac output. Norepinephrine is the preferred first-line vasopressor because it provides strong alpha-1–mediated vasoconstriction that raises arterial tone and MAP with relatively favorable effects on heart rate and myocardial oxygen balance. It improves perfusion pressure and often reduces the need for higher doses of other agents. Other options have drawbacks as first-line: epinephrine can cause more tachycardia and lactate rise; dopamine has a higher risk of tachyarrhythmias and ischemia; phenylephrine is a pure alpha-1 agonist that can increase afterload and may reduce cardiac output and organ perfusion in these patients. If blood pressure remains low after norepinephrine, additional strategies (like vasopressin or an inotrope such as dobutamine if there is low cardiac output) can be considered, but the recommended initial vasopressor is norepinephrine.

In septic shock, after giving fluids to restore intravascular volume, the goal is to rapidly restore mean arterial pressure by increasing systemic vascular resistance without compromising cardiac output. Norepinephrine is the preferred first-line vasopressor because it provides strong alpha-1–mediated vasoconstriction that raises arterial tone and MAP with relatively favorable effects on heart rate and myocardial oxygen balance. It improves perfusion pressure and often reduces the need for higher doses of other agents.

Other options have drawbacks as first-line: epinephrine can cause more tachycardia and lactate rise; dopamine has a higher risk of tachyarrhythmias and ischemia; phenylephrine is a pure alpha-1 agonist that can increase afterload and may reduce cardiac output and organ perfusion in these patients. If blood pressure remains low after norepinephrine, additional strategies (like vasopressin or an inotrope such as dobutamine if there is low cardiac output) can be considered, but the recommended initial vasopressor is norepinephrine.