Norepinephrine Infusion Guidelines

Preparation and Concentration

• The standard concentration of norepinephrine is prepared by adding 4 mg to 250 mL D5W to yield 16 mcg/mL, as recommended by medical guidelines 1

Initial Dosing

• The American College of Cardiology recommends starting norepinephrine at 8-12 mcg/min (0.1-0.5 mcg/kg/min) via central venous access, targeting a mean arterial pressure of 65 mmHg 1, 2
• For hepatorenal syndrome, the initial dose is 0.5 mg/h, increased by 0.5 mg/h every 4 hours to a maximum of 3 mg/h, with a strength of evidence based on clinical guidelines 1, 3

Administration Route

• Central venous access is strongly preferred to prevent tissue necrosis from extravasation, as advised by medical experts 1, 2

Target Blood Pressure and Monitoring

• The primary target mean arterial pressure is ≥65 mmHg, with individualized targets for patients with chronic hypertension or normotensive patients, based on clinical evidence 1, 2, 3
• Blood pressure should be monitored every 5-15 minutes during initial titration, with an emphasis on assessing tissue perfusion markers, as recommended by medical guidelines 1, 3

Critical Pre-Administration Requirement

• A minimum of 30 mL/kg crystalloid bolus should be administered before or concurrent with norepinephrine initiation, with a preference for balanced crystalloids, as advised by medical experts 1

Titration Strategy

• The maintenance dose is typically 2-4 mcg/min, with increases by 0.5 mg/h every 4 hours as needed in hepatorenal syndrome, based on clinical guidelines 1, 3

Escalation for Refractory Hypotension

• When norepinephrine reaches 0.25 mcg/kg/min and hypotension persists, vasopressin 0.03-0.04 units/min may be added, with consideration for epinephrine or dobutamine as alternative second agents, as recommended by medical guidelines 1, 3

Special Populations

• For pregnant patients, norepinephrine should be started at 0.02 mcg/kg/min, targeting a mean arterial pressure of 65 mmHg, with consideration for more restrictive initial boluses, as advised by medical experts 1
• Patients on beta-blockers may require glucagon 1-5 mg IV over 5 min followed by infusion for refractory cardiovascular effects, based on clinical evidence 1, 4

Monitoring for Adverse Effects

• Patients on norepinephrine should be monitored for arrhythmias, excessive vasoconstriction, and increased myocardial oxygen consumption, as recommended by medical guidelines 1, 2