Norepinephrine Side Effects
Some side effects of norepinephrine may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.
For the Consumer
Applies to norepinephrine: parenteral injection
Side effects include:
Headache, weakness, dizziness, tremor, pallor, respiratory difficulty or apnea, precordial pain.
For Healthcare Professionals
Applies to norepinephrine: injectable solution, intravenous solution
While NE can cause hypertension, local vasoconstriction, and tissue hypoxia in any patient, those with hyperthyroidism or who are also taking certain medications are particularly at risk. These medications include cyclopropane or halothane anesthetics, guanethidine, and monoamine oxidase inhibitors (MAOIs).
Cardiovascular side effects from norepinephrine (NE) can be serious. The drug can produce profound hypertension, local vasoconstriction, and tissue hypoxia. NE-induced hypertension typically presents as headache, photophobia, stabbing chest pain, pallor, intense sweating, and/or vomiting. Rare cases of coronary artery spasm have been associated with high doses of NE.
Adequate intravascular volume replacement is strongly recommended before, during, and upon withdrawal of therapy. Inadequate intravascular volume before and during NE therapy can result in decreased perfusion of vital organs, including the heart, liver, and kidney. Inadequate intravascular volume upon NE withdrawal can result in recurrent and profound hypotension. Hypotension, tissue hypoperfusion, and tissue hypoxia can produce ischemic injury and systemic lactic acidosis.
Other cardiovascular side effects include (reflex) bradycardia and arrhythmias.
Nervous system side effects are usually a sign of NE-induced hypertension, and may indicate a need for dosage reduction. Side effects include headache, anxiety, and photophobia.
Blanching along the course of the infused vein may indicate vasa vasorum constriction with increased venous permeability. This can lead to extravasation, local tissue necrosis, and--rarely--tissue sloughing.
Phentolamine is an effective antidote to norepinephrine extravasation. To prevent sloughing and necrosis in areas in which extravasation has taken place, it is recommended that the area be infiltrated as soon as possible with 10 mL to 15 mL of saline solution containing from 5 mg to 10 mg of phentolamine, an adrenergic receptor antagonist. A syringe with a fine hypodermic needle is recommended, with the solution being infiltrated liberally throughout the area, which is easily identified by its cold, hard, and pallid appearance. Phentolamine usually causes immediate and conspicuous local hyperemia if used within 12 hours of extravasation of norepinephrine. In rare cases, excision of necrosed tissue is necessary.
Local intravenous site problems can be severe. Because NE can cause local vasoconstriction, extravasation of the drug at the IV site can cause local tissue necrosis and sloughing. If blanching occurs along the course of the infused vein, another IV site is recommended. Proximal, larger veins serve better than peripheral, smaller veins. Elderly patients, particularly if a leg vein is utilized, are at highest risk.
Hypersensitivity reactions, described by a distinct entity called "adrenergic urticaria," have been reported. In these cases, elevated systemic levels of catecholamines have been associated with psychological stress and generalized urticaria. In some cases, provocation with intradermal norepinephrine or epinephrine has resulted in flares and recurrences.
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