What dose of vasopressin infusion is used for hypotension/shock?
Common dosing for a vasopressin infusion in shock is typically 0.01 to 0.04 units/min (about 0.6 to 2.4 units/hour) as an adjunct to other vasopressors. The exact dose depends on the indication (e.g., septic shock vs. other causes), local protocol, and patient response.
What dose is used as an alternative when norepinephrine isn’t enough?
In many ICU protocols, vasopressin is used as a second-line vasopressor with norepinephrine when blood pressure remains inadequate. Doses still generally stay within 0.01 units/min to start and may be titrated up to around 0.04 units/min if needed.
How is vasopressin infusion typically started and adjusted?
A practical approach in most protocols is:
- Start low (often 0.01 units/min).
- Adjust based on mean arterial pressure (MAP), perfusion, and adverse effects.
- Many protocols limit escalation around 0.03–0.04 units/min rather than pushing to higher doses.
What concentration should you prepare (and how to calculate units/hour)?
Dosing is usually written in units/min or units/hour, so infusion concentration matters for pump programming. If you tell me:
- the vial/concentration you have (units per mL),
- your target dose (e.g., 0.01 units/min),
- and the diluent volume (total mL in the bag/syringe),
I can calculate the exact mL/hour rate for your pump.
What side effects or risks change dosing?
Clinicians watch for:
- Ischemia (especially skin, gut, digits), due to vasoconstriction
- Hyponatremia or fluid/electrolyte issues at higher exposures (less common at typical vasopressin pressor doses)
- Changes in perfusion markers and urine output
If ischemic complications or poor tolerance occur, dosing is usually reduced or stopped per protocol.
Is the dose different for cardiac surgery or other indications?
Yes. Vasopressin regimens differ by indication (for example, vasopressin used during cardiac surgery or for different perioperative goals can use different dosing ranges). If you share the indication, I can narrow the dose range to what’s typically used for that context.
If you answer these two questions—(1) indication (septic shock vs other), and (2) what concentration you have (units/mL)—I’ll give you the exact infusion dose and the corresponding pump rate (mL/hour).