Norvasc (Amlodipine)

Amlodipine, the active ingredient in Norvasc, is a calcium channel blocker presented as an oral tablet for oral use. It treats hypertension and chronic stable angina in adult patients.

GNH USA supplies Norvasc as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Norvasc (amlodipine) belongs to the calcium channel blocker class and is used to manage cardiovascular conditions. - Hypertension: lowers elevated blood pressure by relaxing arterial smooth muscle, reducing peripheral resistance. - Chronic stable angina: improves myocardial oxygen supply by dilating coronary arteries, decreasing frequency of chest pain episodes. - Coronary artery disease: helps prevent ischemic events by maintaining adequate coronary blood flow and reducing cardiac workload.

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

Common Side Effects: - Peripheral edema: swelling of the ankles or feet due to fluid accumulation. - Headache: mild to moderate intensity, often transient. - Flushing: sensation of warmth and redness, especially on the face. - Dizziness or light‑headedness, particularly after standing. - Fatigue: general feeling of tiredness. - Palpitations: awareness of heartbeats.

Serious or Rare Side Effects: - Severe hypotension: markedly low blood pressure requiring medical attention. - Myocardial infarction: rare occurrence of heart attack. - Hepatic dysfunction: abnormal liver enzyme elevations. - Allergic reactions: rash, pruritus, or anaphylaxis. - Cardiac conduction abnormalities: heart block or arrhythmias.

Before initiating therapy with amlodipine, clinicians should consider several safety measures. - Blood pressure monitoring: regularly assess to avoid excessive hypotension. - Cardiac evaluation: review history of heart failure or recent myocardial infarction. - Hepatic function: adjust use in patients with significant liver impairment. - Concomitant antihypertensives: watch for additive blood‑pressure‑lowering effects. - Discontinuation: avoid abrupt cessation to prevent rebound hypertension. - Store at below 25°C: keep in the original packaging, protect from moisture and direct sunlight.

Amlodipine can interact with other medicines, altering its efficacy or safety profile.

Major Interactions (Avoid): - Strong CYP3A4 inhibitors (e.g., ketoconazole, itraconazole): may increase amlodipine plasma levels, raising risk of hypotension. - Concurrent use with other potent antihypertensives (e.g., clonidine, alpha‑blockers): can cause additive blood‑pressure reduction. - Grapefruit juice: inhibits CYP3A4 metabolism, potentially elevating drug concentrations.

Moderate Interactions (Monitor Closely): - CYP3A4 inducers (e.g., rifampin, carbamazepine): may reduce amlodipine effectiveness. - Beta‑blockers: combined effect on heart rate and blood pressure requires monitoring. - Diuretics: may enhance antihypertensive response, necessitating dose adjustments. - NSAIDs: can blunt antihypertensive effect, especially in renal‑impaired patients. - Digoxin: monitor for signs of increased serum digoxin levels.