Product image of Isoptin (Verapamil Hydrochloride) supplied by GNH India

Isoptin

Active Ingredient:
Verapamil Hydrochloride
Origin:
EU

Isoptin (Verapamil Hydrochloride)

Verapamil Hydrochloride, the active ingredient in Isoptin, is a calcium channel blocker presented as an oral tablet for oral use. It treats hypertension, angina pectoris and certain supraventricular tachyarrhythmias in adult patients.

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

Manufacturer / TM Owner

Viatris Healthcare Limited

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Indications & Clinical Uses

Isoptin is a calcium channel blocker used to manage cardiovascular conditions that involve elevated vascular tone or abnormal cardiac conduction.

  • Hypertension: lowers systemic blood pressure by causing arterial vasodilation.
  • Angina pectoris: reduces frequency and severity of chest pain by decreasing myocardial oxygen demand.
  • Supraventricular tachyarrhythmias (e.g., atrial fibrillation, atrial flutter): helps control heart rate and may restore normal rhythm.

How It Works

  • Verapamil Hydrochloride inhibits L‑type calcium channels in cardiac myocytes and vascular smooth muscle, reducing intracellular calcium influx. This leads to decreased myocardial contractility, slowed atrioventricular nodal conduction, and vasodilation of peripheral arteries, collectively lowering blood pressure and alleviating cardiac workload.

Side Effects

Common Side Effects

  • Constipation
  • Headache
  • Dizziness
  • Peripheral edema

Serious or Rare Side Effects

  • Bradycardia
  • Severe hypotension
  • Heart block
  • Allergic reactions such as rash or angioedema
  • Hepatic dysfunction

Precautions & Warnings

Before initiating therapy, consider the following precautions:

  • Monitor blood pressure regularly: ensure adequate control and avoid excessive drops.
  • Monitor heart rate: watch for bradycardia, especially in patients with pre‑existing conduction disorders.
  • Use caution in heart failure: verapamil may worsen ventricular function.
  • Avoid in severe hepatic impairment: metabolism is reduced, increasing exposure.
  • Adjust dose in renal impairment: excretion may be altered.
  • Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Avoid Interactions

Verapamil can interact with several medicines; awareness helps prevent adverse outcomes.

Major Interactions (Avoid)

  • Beta‑blockers: additive bradycardia and AV‑node block.
  • Digoxin: increased serum digoxin levels, raising toxicity risk.
  • Strong CYP3A4 inhibitors (e.g., clarithromycin, ketoconazole): elevate verapamil concentrations.

Moderate Interactions (Monitor Closely):\n- Diuretics: may cause electrolyte shifts affecting cardiac rhythm.

  • Statins metabolised by CYP3A4 (e.g., simvastatin): higher risk of myopathy, monitor levels.

Frequently Asked Questions

Isoptin, containing verapamil hydrochloride, is prescribed for hypertension, angina pectoris and certain supraventricular tachyarrhythmias such as atrial fibrillation or atrial flutter. It helps lower blood pressure, relieve chest pain, and control abnormal heart rhythms in adult patients.

Verapamil hydrochloride blocks L‑type calcium channels in cardiac muscle and vascular smooth muscle. By reducing calcium entry, it decreases myocardial contractility, slows atrioventricular nodal conduction, and causes peripheral vasodilation, which together lower blood pressure and reduce cardiac workload.

The appropriate dose of Isoptin is determined by the prescribing clinician based on the individual’s medical condition, response to therapy, and other factors. Dosage may be adjusted over time to achieve optimal blood pressure control or symptom relief.

The safety of Isoptin in pregnancy or while breastfeeding has not been definitively established. Healthcare providers should weigh potential benefits against possible risks and consider alternative therapies when appropriate.

To order Isoptin, submit an enquiry on the product page at gnhindia.com specifying the required quantity. GNH India works with hospitals, pharmacies and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details and any necessary import documentation.

Isoptin (verapamil) is a non‑dihydropyridine calcium channel blocker, primarily affecting cardiac conduction and contractility, whereas dihydropyridine agents like amlodipine mainly cause vascular smooth‑muscle relaxation. Verapamil is often chosen when rate control in arrhythmias is needed, while other agents may be preferred for isolated hypertension.

Isoptin should be stored at room temperature, below 25 °C, in its original packaging. Keep the product away from moisture, direct sunlight and heat sources to maintain stability and potency.

Isoptin is taken orally, usually as a tablet, with or without food as directed by the prescriber. Patients should follow the dosing schedule provided by their healthcare professional and not alter the regimen without consultation.

Serious risks include marked bradycardia, severe hypotension, and heart block, which can lead to syncope or cardiac arrest. Patients should be monitored for these events, especially when initiating therapy or when combined with other agents that affect heart rate or blood pressure.

Isoptin is contraindicated in patients with known hypersensitivity to verapamil or any component of the formulation, in those with severe hypotension, advanced heart block without a pacemaker, and in individuals with certain types of heart failure where reduced contractility could be harmful.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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