Nerdipina Retard (Nicardipine Hydrochloride)

Nerdipina Retard belongs to the calcium channel blocker class and is indicated for cardiovascular conditions that benefit from arterial vasodilation.

• Hypertension: lowers elevated blood pressure and reduces cardiovascular risk.
• Chronic stable angina: improves exercise tolerance by decreasing myocardial oxygen demand.
• Coronary artery disease (angina pectoris): alleviates chest pain episodes through enhanced coronary blood flow.

• Nicardipine hydrochloride selectively antagonizes L‑type calcium channels in vascular smooth muscle, inhibiting calcium influx. This causes arterial smooth‑muscle relaxation, leading to vasodilation, reduced peripheral resistance, and consequently lower blood pressure and decreased myocardial oxygen demand.

Adverse reactions may occur with any dosage form of nicardipine.

Common Side Effects

• Headache: mild to moderate intensity, often transient.
• Flushing: warm sensation, usually resolves without intervention.
• Peripheral edema: swelling of ankles or lower legs.
• Dizziness or light‑headedness, especially when standing quickly.
• Nausea: occasional gastrointestinal discomfort.

Serious or Rare Side Effects

• Severe hypotension: marked drop in blood pressure requiring medical attention.
• Myocardial infarction: rare but possible in susceptible patients.
• Hepatic dysfunction: abnormal liver enzymes or hepatitis.
• Severe bradycardia: markedly slow heart rate.
• Allergic reactions: rash, pruritus, or anaphylaxis.
• Neutropenia: significant reduction in white blood cells.

Before initiating therapy, clinicians should evaluate patient‑specific factors and monitor for potential complications.

• Monitor blood pressure: adjust dose to maintain target range.
• Assess cardiac function: especially in patients with existing heart disease.
• Review concomitant antihypertensives: avoid excessive hypotension.
• Use caution in hepatic impairment: dose may need adjustment.
• Avoid abrupt discontinuation: taper to prevent rebound hypertension.
• Store at below 25°C: keep in the original packaging, protect from moisture and direct sunlight.

Nicardipine may interact with several drug classes, altering its efficacy or safety profile.

Major Interactions (Avoid)

• CYP3A4 inhibitors (e.g., ketoconazole, itraconazole): increase nicardipine plasma concentrations.
• Other calcium channel blockers: additive hypotensive effect.
• Grapefruit juice: can raise systemic exposure.

Moderate Interactions (Monitor Closely)

• CYP3A4 inducers (e.g., rifampicin, carbamazepine): may reduce therapeutic effect.
• Diuretics: enhanced blood‑pressure lowering, monitor electrolytes.
• Beta‑blockers: may require dose adjustment to avoid excessive heart‑rate reduction.