Cyclopropane and halothane anaesthetics increase cardiac autonomic irritability and therefore seem to sensitise the myocardium to the action of intravenously administered adrenaline or noradrenaline. Hence, the use of noradrenaline during cyclopropane and halothane anaesthesia is generally considered contraindicated because of the risk of producing ventricular tachycardia or fibrillation. The same type of cardiac arrhythmias may result from the use of noradrenaline in patients with profound hypoxia or hypercarbia.
Noradrenaline should be used with extreme caution in patients receiving monoamine oxidase inhibitors (MAOI) or antidepressants of the triptyline or imipramine types, because severe, prolonged hypertension may result.
Noradrenaline Injection infusion solutions should not be mixed with other drugs. Infusion solutions containing noradrenaline acid tartrate have been reported to be incompatible with alkalis and oxidising agents, barbiturates, chlorpheniramine, chlorothiazide, nitrofurantoin, phenytoin, sodium bicarbonate, sodium iodide, streptomycin, sulfadiazine and sulfafurazole.
Incompatibilities: Noradrenaline must not be mixed with other medicinal products except those mentioned in Dosage & Administration.
Infusion solutions containing noradrenaline tartrate have been reported to be incompatible with the following substances: alkalis and oxidising agents, barbiturates, chlorpheniramine, chlorothiazide, nitrofurantoin, novobiocin, phenytoin, sodium bicarbonate, sodium iodide, streptomycin.