Noradrenalina Tartrato Monico (Noradrenaline Tartrate)

• Noradrenaline is used as a potent vasopressor in conditions that involve severe hypotension or impaired cardiac output.
• Acute hypotension: restores vascular tone and raises systemic blood pressure.
• Septic shock: improves mean arterial pressure and organ perfusion.
• Cardiogenic shock: enhances myocardial contractility while supporting systemic pressure.
• Cardiac arrest (as part of ACLS): provides vasoconstriction to maintain coronary perfusion during resuscitation.
• Low cardiac output states: increases stroke volume and cardiac output in refractory cases.

• Noradrenaline acts as a direct agonist at α1‑adrenergic receptors on vascular smooth muscle, causing peripheral vasoconstriction, and at β1‑adrenergic receptors in the heart, increasing contractility and heart rate. The combined α‑ and β‑stimulating effects raise systemic vascular resistance and cardiac output, thereby elevating arterial pressure in acute shock states. These actions are dose‑dependent and are rapidly reversible upon discontinuation, providing tight titration capability in intensive care settings.

Noradrenaline may be associated with a range of adverse reactions, varying from frequent to rare but serious.

Common Side Effects

• Headache: pressure sensation often related to rapid blood pressure rise.
• Tachycardia: increased heart rate due to β1 stimulation.
• Peripheral ischemia: reduced blood flow to extremities causing coldness or pain.
• Nausea: gastrointestinal discomfort reported in some patients.

Serious or Rare Side Effects

• Severe hypertension: excessive rise in arterial pressure risking vascular injury.
• Myocardial ischemia: reduced coronary perfusion due to increased cardiac workload.
• Cardiac arrhythmias: life‑threatening rhythm disturbances such as ventricular tachycardia.
• Tissue necrosis at injection site: extravasation leading to local tissue damage.

When using Noradrenaline, careful monitoring and specific precautions are essential to minimize risks.

• Cardiovascular monitoring: continuous blood pressure and heart‑rate observation is required.
• Dose titration: adjust infusion rate gradually to achieve target pressure while avoiding overshoot.
• Contraindications: do not use in patients with known hypersensitivity to noradrenaline or its excipients.
• Caution in arrhythmias: monitor ECG closely in patients with pre‑existing rhythm disorders.
• Peripheral vascular disease: use with caution as vasoconstriction may worsen limb ischemia.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Noradrenaline can interact with several drugs, altering its pressor effects or increasing adverse risk.

Major Interactions (Avoid)

• MAO inhibitors: combined use may cause hypertensive crisis.
• Tricyclic antidepressants: additive sympathomimetic activity can lead to severe hypertension.
• Ergot alkaloids: concurrent use may precipitate vasospasm and ischemia.

Moderate Interactions (Monitor Closely)

• Beta‑blockers: may blunt the β1‑mediated cardiac effects of noradrenaline.
• Vasodilators (e.g., nitroglycerin): may require higher noradrenaline doses to maintain pressure.
• ACE inhibitors or ARBs: can enhance hypotensive episodes if noradrenaline is tapered too quickly.
• Diuretics: volume depletion may reduce response to noradrenaline and necessitate dose adjustment.