Noradrenaline (Norepinephrine) Zentiva Pharma Uk (Noradrenaline Tartrate)

Noradrenaline (norepinephrine) acts as a potent vasopressor in the adrenergic system, addressing severe hypotensive states.

• Acute hypotension: restores systemic vascular resistance and improves blood pressure.
• Septic shock: supports circulatory function and maintains perfusion pressure.
• Cardiac arrest: provides essential vasoconstriction during resuscitation efforts.

• Noradrenaline tartrate binds directly to alpha‑1 and beta‑1 adrenergic receptors on vascular smooth muscle and cardiac myocytes. Activation of alpha‑1 receptors induces vasoconstriction, increasing systemic vascular resistance, while beta‑1 stimulation enhances myocardial contractility and heart rate, together raising arterial pressure and cardiac output in critically ill patients.

Adverse reactions may occur with intravenous norepinephrine administration.

Common Side Effects

• Tachycardia: increased heart rate due to beta‑1 stimulation.
• Hypertension: excessive rise in blood pressure from alpha‑1 vasoconstriction.
• Headache: vascular changes can trigger cranial discomfort.
• Anxiety or restlessness: central adrenergic effects.
• Nausea: gastrointestinal upset.
• Peripheral ischemia: reduced blood flow to extremities.

Serious or Rare Side Effects

• Myocardial ischemia: reduced coronary perfusion from high afterload.
• Severe arrhythmias: life‑threatening rhythm disturbances.
• Tissue necrosis at injection site: extravasation injury.
• Pulmonary edema: fluid accumulation due to increased afterload.
• Severe hypertension leading to intracranial hemorrhage.
• Cardiac arrest secondary to profound arrhythmia.

Careful clinical monitoring is required when using norepinephrine.

• Dose titration: adjust infusion rate based on real‑time blood pressure response.
• Cardiovascular monitoring: continuous ECG and arterial pressure monitoring are essential.
• Extravasation risk: avoid infiltration; inspect IV site frequently.
• Contraindications: avoid in patients with uncorrected tachyarrhythmias.
• Drug interactions: review concomitant medications that affect vascular tone.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Norepinephrine may interact with several drug classes, requiring vigilance.

Major Interactions (Avoid)

• MAO inhibitors: risk of hypertensive crisis.
• Tricyclic antidepressants: additive pressor effects.
• Beta‑blockers: may blunt desired cardiac response.
• Ergot alkaloids: increased risk of severe vasoconstriction.
• Clonidine withdrawal: unpredictable blood pressure changes.

Moderate Interactions (Monitor Closely)

• Vasodilators (e.g., nitroglycerin): may require higher norepinephrine doses.
• Other vasopressors: additive pressor effect can cause excessive hypertension.
• Calcium channel blockers: potential for altered vascular response.
• Anesthetic agents (e.g., halothane): may modify hemodynamic stability.
• Diuretics: volume status changes can affect dosing requirements.