Mykronor (Noradrenaline Tartrate)

• Mykronor, a vasopressor acting on the adrenergic system, is indicated for several acute shock states.
• Acute hypotension: raises systemic blood pressure to maintain organ perfusion.
• Septic shock: restores vascular tone and supports circulation in severe infection.
• Cardiogenic shock: improves cardiac output and systemic perfusion when the heart fails to pump effectively.
• Cardiac arrest: provides vasoconstrictive support during resuscitation efforts.

• Noradrenaline acts as a direct agonist at α1‑adrenergic receptors on vascular smooth muscle, producing potent peripheral vasoconstriction that elevates systemic vascular resistance and arterial pressure. It also stimulates β1‑adrenergic receptors in the heart, modestly increasing heart rate and contractility, which together raise cardiac output. These actions are dose‑dependent and are rapidly reversible upon discontinuation.

Noradrenaline may produce a range of adverse reactions, which are categorized by frequency and severity.

Common Side Effects

• Tachycardia: rapid increase in heart rate.
• Hypertension: excessive rise in blood pressure.
• Headache: pressure‑type head pain.

Serious or Rare Side Effects

• Myocardial ischemia: reduced blood flow to heart muscle.
• Cardiac arrest: sudden loss of heart function.
• Tissue necrosis at infusion site: local tissue death due to extravasation.

• When using Mykronor, clinicians should observe several safety precautions to minimize risks.
• Cardiovascular monitoring: continuous blood pressure and heart‑rate monitoring is required.
• Titration by experienced staff: dose should be adjusted gradually under specialist supervision.
• Contraindication in uncontrolled hypertension: avoid use in patients with severely elevated baseline pressure.
• Caution in myocardial ischemia: use only if benefits outweigh risk of reduced coronary perfusion.
• Adjust in renal or hepatic impairment: monitor plasma levels and organ function closely.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Noradrenaline can interact with other medicines, influencing its pressor effect or causing adverse events.

Major Interactions (Avoid)

• MAO inhibitors: risk of hypertensive crisis.
• Tricyclic antidepressants: additive sympathomimetic effect leading to severe hypertension.
• Other vasopressors (e.g., epinephrine): may cause excessive vasoconstriction.

Moderate Interactions (Monitor Closely)

• Beta‑blockers: may blunt the desired increase in cardiac output.
• Calcium channel blockers: can enhance hypotensive episodes if dose is reduced.
• Diuretics: may potentiate volume depletion and affect blood pressure response.
• General anesthetics: may alter hemodynamic stability during surgery.