Norvasc (Amlodipine)

Amlodipine, the active ingredient in Norvasc, is a calcium channel blocker presented as an oral formulation for oral use. It is used to treat elevated blood pressure and chest pain caused by reduced blood flow to the heart, primarily in adult patients.

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

Amlodipine, a calcium channel blocker, is employed in the management of cardiovascular conditions.

- Hypertension: lowers systemic blood pressure by relaxing arterial smooth muscle. - Chronic stable angina: reduces frequency of angina attacks by improving coronary blood flow. - Ischemic heart disease: contributes to symptom control by vasodilation of coronary vessels.

Amlodipine may cause a range of adverse reactions, varying from mild to serious.

Common Side Effects: - Peripheral edema: swelling of the ankles or feet. - Headache: mild to moderate intensity. - Flushing: sensation of warmth and redness. - Dizziness: light‑headed feeling, especially on standing. - Fatigue: general tiredness. - Palpitations: awareness of heartbeats.

Serious or Rare Side Effects: - Severe hypotension: marked drop in blood pressure. - Myocardial infarction: rare occurrence of heart attack. - Liver enzyme elevation: signs of hepatic stress. - Allergic reactions: rash, itching, or swelling. - Arrhythmias: abnormal heart rhythms. - Heart block: impaired electrical conduction.

When prescribing amlodipine, several precautions should be observed to ensure safe use.

- Blood pressure monitoring: check regularly to avoid excessive hypotension. - Cardiac assessment: evaluate heart function in patients with existing cardiac disease. - Hepatic impairment: use caution and consider dose adjustment in liver dysfunction. - Concomitant antihypertensives: assess risk of additive blood pressure lowering. - Abrupt discontinuation: avoid sudden stop to prevent rebound hypertension. - Store at room temperature: keep in original packaging, protect from moisture and direct sunlight.

Amlodipine can interact with other medicines, influencing its effectiveness or safety.

Major Interactions (Avoid): - Strong CYP3A4 inhibitors (e.g., clarithromycin, itraconazole): may increase amlodipine levels and risk of toxicity. - Grapefruit juice: can raise plasma concentrations, leading to enhanced effects. - Concurrent use with other potent antihypertensives: may cause dangerous hypotension.

Moderate Interactions (Monitor Closely): - CYP3A4 inducers (e.g., rifampin, carbamazepine): may reduce amlodipine exposure and efficacy. - Diuretics: combined use can increase risk of electrolyte imbalance and low blood pressure. - Non‑steroidal anti‑inflammatory drugs (NSAIDs): may attenuate antihypertensive response.