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LEVOPHED® NOREPINEPHRINE BITARTRATE, Vial U.S. Physician Prescribing Information Drug Interactions (norepinephrine bitartrate injection, USP)

7 DRUG INTERACTIONS

7.1 MAO-Inhibiting Drugs

Co-administration of LEVOPHED with monoamine oxidase (MAO) inhibitors or other drugs with MAO-inhibiting properties (e.g., linezolid) can cause severe, prolonged hypertension.

If administration of LEVOPHED cannot be avoided in patients who recently have received any of these drugs and in whom, after discontinuation, MAO activity has not yet sufficiently recovered, monitor for hypertension.

7.2 Tricyclic Antidepressants

Co-administration of LEVOPHED with tricyclic antidepressants (including amitriptyline, nortriptyline, protriptyline, clomipramine, desipramine, imipramine) can cause severe, prolonged hypertension. If administration of LEVOPHED cannot be avoided in these patients, monitor for hypertension.

7.3 Antidiabetics

LEVOPHED can decrease insulin sensitivity and raise blood glucose. Monitor glucose and consider dosage adjustment of antidiabetic drugs.

7.4 Halogenated Anesthetics

Concomitant use of LEVOPHED with halogenated anesthetics (e.g., cyclopropane, desflurane, enflurane, isoflurane, and sevoflurane) may lead to ventricular tachycardia or ventricular fibrillation. Monitor cardiac rhythm in patients receiving concomitant halogenated anesthetics.

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