Nursing care
Blanching at a norepinephrine IV site: what the nurse does first
Written and reviewed by Victoria Reed, MSN, RN, OCN · 4 min read · Updated October 2026
Short answer
Stop the norepinephrine infusion at that site, leave the cannula in place, and notify the provider straight away. Pale, cold, hard skin suggests the drug has leaked into tissue and is clamping local blood vessels. The antidote, phentolamine, is given into the area as soon as possible, while the vasopressor is restarted through another vein to avoid a dangerous drop in blood pressure.
First action: stop the infusion at the affected site
The first action is to stop the norepinephrine running into that site. Norepinephrine is a strong vasoconstrictor, and labelling warns that leakage into the tissues can cause local tissue death. Blanching along the vein, or an area that is cold, hard and pale, suggests the drug is reaching the tissues and squeezing their blood supply.
This is a safety priority that sits alongside circulation. Every minute the drug keeps leaking, more tissue is at risk. Labelling also notes that blanching can occur along the vein without obvious extravasation, attributed to constriction of the vessel wall, so the nurse treats the finding seriously even when there is no visible swelling.
Keep the cannula and protect the blood pressure
Common extravasation teaching is to leave the cannula in place at first and aspirate what can be withdrawn from it, as facility policy directs, before removing it. Labelling advises infiltrating the affected area with phentolamine, an alpha blocker, as soon as possible, and describes visible local effects when it is given within twelve hours. The provider prescribes it and the procedure follows local protocol.
The client still needs blood pressure support. Labelling warns against abrupt withdrawal, which can cause a sudden fall in pressure. The nurse arranges for the infusion to restart through another large vein or a central line as quickly as possible, ideally with a second line ready, and monitors blood pressure closely during the switch.
What can wait and what can be delegated
Elevating the limb, marking the edge of the affected area and photographing it per policy are useful once the infusion is stopped and the provider is aware. Applying heat or cold is protocol dependent for vasopressors, so the nurse follows local guidance rather than reaching for a compress by habit. Full documentation follows.
Another nurse can help establish new access or bring the extravasation kit, and an assistant can fetch supplies or call for help. Titrating the vasopressor, assessing the site and the client's perfusion, and giving the antidote stay with the registered nurse or the provider. Continue checking the new site frequently for free flow.
Worked scenario: pale skin around a forearm cannula
Hypothetical practice question: a client in septic shock is receiving norepinephrine through a peripheral forearm cannula. The nurse notes the skin around the site is pale, cool and firm. Which action should the nurse take first? Options: apply a warm compress; remove the cannula immediately; stop the infusion at that site; flush the cannula with saline to check patency.
Stopping the infusion at that site is correct because it ends further leakage. Removing the cannula straight away is tempting, but it loses a route that local policy may use for aspiration, and the antidote is infiltrated into the surrounding area. Flushing pushes more drug into the tissue. A compress is protocol dependent and does not stop the leak.
Why the tempting distractors are wrong
Turning the norepinephrine off and leaving it off is a serious trap. Norepinephrine is described as a first-line vasopressor in septic shock, and a client who needs it is likely to lose blood pressure without it. The correct sequence is to stop it at the damaged site and get it running again through safe access, not to end the therapy.
Slowing the rate at the same site is another trap: it reduces but does not stop the leak. Waiting to see whether the colour returns also delays the antidote, which works best when given early. The exam point is to protect both the tissue and the circulation, rather than choosing one at the expense of the other.
Sources and further reading
Norepinephrine bitartrate injection, prescribing information, DailyMed. Infusion into a large vein, blanching along the vein, risk of necrosis, phentolamine infiltration as soon as possible and within twelve hours, frequent checks of the site, avoiding abrupt withdrawal.
Shock, MSD Manual Professional Edition. Norepinephrine as the first-line vasopressor in septic shock.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our pharmacology practice questions are the closest set to what this page covers.
One question from the pharmacology set
A client with heart failure is started on furosemide 40 mg PO daily. Which findings should the nurse report to the provider before administering the next dose? Select all that apply.
Rationale
Furosemide is a loop diuretic, so the two things you are watching are potassium and kidney function. A potassium of 2.9 mEq/L is below the 3.5–5.0 reference range and puts the client at risk for dysrhythmia — hold and report. Muscle cramps with palpitations are the clinical face of that same hypokalemia, so they are reported together, not separately. A creatinine that doubles signals the diuresis has outrun renal perfusion. A blood pressure of 132/78 and a 1 kg loss are the expected response to the drug working, not reasons to hold it.
Answer: A, D, E
Common questions
Why is norepinephrine given into a large vein or central line?
Labelling advises a large vein because the drug constricts blood vessels and can damage tissue if it leaks. A larger vessel carries more blood flow to dilute it, and a central line reduces the chance of tissue injury. Local policy sets when a peripheral line is acceptable and how often it is checked.
How does phentolamine help after extravasation?
Phentolamine blocks the alpha receptors that norepinephrine stimulates, so the clamped local vessels relax and blood returns to the tissue. Labelling describes visible reddening when it works and advises giving it as soon as possible. The provider prescribes it and the technique follows local protocol.
Which signs at the site suggest vasopressor extravasation?
Blanching, coolness, firmness, swelling, pain or a mottled appearance near the site or along the vein are concerning. A sluggish or stopped infusion can also be a clue. Labelling advises checking the site often for free flow, so the nurse looks at it regularly rather than waiting for complaints.
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