Isoptin Sr

Verapamil, the active ingredient in Isoptin Sr, is a calcium channel blocker presented as an oral dosage form for oral use. It is employed to manage high blood pressure, chest pain from angina, and certain cardiac rhythm disorders in adult patients.

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

Isoptin Sr is a calcium channel blocker used in cardiovascular disease management.

Hypertension: lowers elevated blood pressure by relaxing vascular smooth muscle. Angina pectoris: reduces frequency of chest pain episodes by decreasing myocardial oxygen demand. Cardiac arrhythmias: helps restore normal heart rhythm in supraventricular and ventricular tachyarrhythmias.

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

Common Side Effects: - Headache: mild to moderate intensity. - Constipation: reduced bowel motility. - Dizziness or light‑headedness: especially on standing. - Peripheral edema: swelling of ankles or feet. - Flushing: transient warmth and redness. - Nausea: occasional upset stomach.

Serious or Rare Side Effects: - Bradycardia: markedly slow heart rate. - Heart block: impaired electrical conduction. - Severe hypotension: dangerous drop in blood pressure. - Hepatic dysfunction: abnormal liver enzymes. - Allergic reactions: rash, itching, or anaphylaxis. - Worsening heart failure: fluid retention and dyspnea.

Before initiating therapy, consider patient‑specific factors and monitor appropriately.

Renal impairment: adjust monitoring as clearance may be reduced. Hepatic disease: use with caution; hepatic metabolism may be altered. Pre‑existing heart block or sick sinus syndrome: avoid or use under specialist supervision. Concomitant beta‑blockers: increased risk of bradycardia and AV block. Pregnancy and lactation: safety not established; weigh benefits against risks. Store at ambient temperature: keep below 25 °C, retain in original packaging, protect from moisture and direct sunlight.

Verapamil interacts with several drug classes; awareness helps prevent adverse events.

Major Interactions (Avoid): - Strong CYP3A4 inhibitors (e.g., ketoconazole, clarithromycin): may cause toxic verapamil levels. - Digoxin: increased risk of digoxin toxicity. - Beta‑blockers: additive bradycardia and AV‑block risk.

Moderate Interactions (Monitor Closely): - CYP3A4 inducers (e.g., rifampin, carbamazepine): may reduce efficacy. - Statins metabolised by CYP3A4 (e.g., simvastatin): higher statin concentrations. - Antacids containing aluminum or magnesium: may decrease absorption if taken simultaneously.