Nolvac (Amlodipine)

Amlodipine is used to manage conditions that involve elevated vascular resistance and myocardial oxygen demand.

• Hypertension: lowers blood pressure by relaxing arterial smooth muscle, reducing cardiovascular risk.
• Chronic stable angina: improves chest pain control by increasing coronary blood flow.
• Cardiovascular risk reduction in hypertensive patients: contributes to long‑term prevention of stroke and heart attack when combined with lifestyle measures.

• Amlodipine selectively inhibits the influx of calcium ions through L‑type calcium channels in vascular smooth muscle and cardiac myocytes. This inhibition prevents calcium‑dependent contraction, causing vasodilation of peripheral arteries, reduced systemic vascular resistance, and modest coronary artery dilation, which together lower blood pressure and improve myocardial oxygen supply.

Amlodipine may cause a range of adverse reactions, most of which are mild and reversible.

Common Side Effects

• Headache: mild to moderate intensity, often transient.
• Flushing: sensation of warmth, especially on the face.
• Peripheral edema: swelling of ankles or lower legs.
• Dizziness or light‑headedness, particularly after standing.
• Fatigue: general tiredness without specific cause.
• Palpitations: awareness of heartbeat.

Serious or Rare Side Effects

• Severe hypotension: marked drop in blood pressure requiring medical attention.
• Myocardial infarction: rare occurrence, especially in patients with pre‑existing coronary disease.
• Hepatic dysfunction: elevated liver enzymes or jaundice.
• Allergic reactions: rash, itching, or anaphylaxis.
• Stevens‑Johnson syndrome or toxic epidermal necrolysis.
• Blood dyscrasias: neutropenia or thrombocytopenia.

Before initiating amlodipine therapy, clinicians should assess individual risk factors and monitor patients for specific concerns.

• Blood pressure monitoring: ensure adequate control without excessive hypotension.
• Cardiac assessment: evaluate for heart failure or recent myocardial infarction.
• Hepatic impairment: adjust use in patients with liver disease.
• Concomitant antihypertensives: avoid additive hypotensive effects.
• Abrupt discontinuation: taper to prevent rebound hypertension.
• Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Amlodipine can interact with several drug classes, altering its efficacy or safety profile.

Major Interactions (Avoid)

• Strong CYP3A4 inhibitors (e.g., clarithromycin, itraconazole): may increase amlodipine plasma levels.
• Concurrent use with other potent antihypertensives: risk of severe hypotension.
• Grapefruit juice: can elevate drug concentrations.

Moderate Interactions (Monitor Closely):\n- CYP3A4 inducers (e.g., rifampin, carbamazepine): may reduce effectiveness.

• Diuretics: may enhance blood‑pressure‑lowering effect.
• NSAIDs: can attenuate antihypertensive response.
• Digoxin: potential increase in serum digoxin levels.