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

Isoptin Retard

Active Ingredient:
Verapamil Hydrochloride
Origin:
EU

Isoptin Retard (Verapamil Hydrochloride)

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

GNH India supplies Isoptin Retard as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide. The company follows stringent quality standards and provides regulatory documentation to support import and distribution in multiple jurisdictions, including compliance with EU GMP guidelines.

Manufacturer / TM Owner

Viatris Oy

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Indications & Clinical Uses

  • Isoptin Retard, a calcium channel blocker, is used in cardiovascular conditions that involve elevated vascular tone or abnormal cardiac conduction.
  • Hypertension: lowers systemic blood pressure by relaxing arterial smooth muscle.
  • Angina pectoris: reduces myocardial oxygen demand and improves coronary blood flow.
  • Cardiac arrhythmias (e.g., supraventricular tachycardia): slows atrioventricular nodal conduction to control heart rate.

How It Works

  • Verapamil Hydrochloride blocks L‑type calcium channels in cardiac myocytes and vascular smooth‑muscle cells, decreasing calcium influx during depolarization. The reduced intracellular calcium diminishes myocardial contractility, slows conduction through the atrioventricular node, and promotes vasodilation of peripheral arteries, collectively lowering blood pressure and relieving anginal symptoms. It also modestly reduces heart rate by influencing the sinus node and lowers afterload by relaxing arteriolar smooth muscle, contributing to its anti‑anginal and anti‑arrhythmic actions.

Side Effects

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

Common Side Effects

  • Headache: mild to moderate head pain.
  • Peripheral edema: swelling of ankles or feet.
  • Constipation: reduced bowel motility.
  • Dizziness or light‑headedness: due to blood‑pressure lowering.

Serious or Rare Side Effects

  • Bradycardia: markedly slow heart rate.
  • Heart block: impaired AV‑nodal conduction.
  • Severe hypotension: sudden drop in blood pressure.

Precautions & Warnings

  • When prescribing Isoptin Retard, clinicians should observe several precautionary measures to ensure patient safety.
  • Assess cardiac function: obtain baseline ECG and monitor for bradyarrhythmias.
  • Review concomitant medications: avoid drugs that also depress AV conduction.
  • Monitor blood pressure: adjust therapy if hypotension occurs.
  • Use caution in hepatic impairment: dose may need adjustment.
  • Store at ambient temperature: keep below 25 °C, retain in original packaging, protect from moisture.

Avoid Interactions

Verapamil interacts with several medicines; understanding the interaction level guides clinical decisions.

Major Interactions (Avoid)

  • Beta‑blockers (e.g., propranolol): risk of severe bradycardia and AV block.
  • CYP3A4 inhibitors (e.g., ketoconazole, clarithromycin): may cause toxic plasma concentrations.

Moderate Interactions (Monitor Closely)

  • Digoxin: increased serum levels, monitor for toxicity.
  • Statins metabolized by CYP3A4 (e.g., simvastatin): risk of myopathy, consider dose reduction.
  • Carbamazepine: may reduce verapamil effectiveness, monitor therapeutic response.

Frequently Asked Questions

Isoptin Retard contains verapamil hydrochloride and is prescribed to lower high blood pressure, relieve chest pain caused by angina, and control certain abnormal heart rhythms such as supraventricular tachycardia. It is used in adult patients when a calcium‑channel‑blocking strategy is appropriate for cardiovascular management.

Verapamil Hydrochloride blocks L‑type calcium channels in the heart and blood‑vessel walls. By reducing calcium entry into cells, it relaxes vascular smooth muscle, decreases myocardial contractility, slows conduction through the atrioventricular node, and lowers heart rate, which together lower blood pressure and lessen cardiac workload.

The exact dose of Isoptin Retard is determined by the prescribing clinician based on the individual’s medical condition, response to therapy, and other medications. Healthcare professionals adjust the regimen to achieve the desired blood‑pressure or anti‑anginal effect while monitoring safety.

Safety data for verapamil during pregnancy and lactation are limited, and the product is classified as pregnancy category unknown. Women who are pregnant, planning to become pregnant, or breastfeeding should discuss potential risks and benefits with their healthcare provider before using Isoptin Retard.

To place an order, submit an enquiry on the Isoptin Retard 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 Retard is a non‑dihydropyridine calcium channel blocker, similar to diltiazem, and primarily affects cardiac conduction and contractility. In contrast, dihydropyridine agents such as amlodipine mainly cause peripheral vasodilation with less impact on heart rate. Choice depends on the clinical goal—rate control and anti‑anginal effect versus pure blood‑pressure reduction.

Store Isoptin Retard tablets at ambient temperature, preferably below 25 °C (77 °F). Keep the product in its original container, protect it from moisture and direct sunlight, and ensure the packaging remains tightly closed until use.

Isoptin Retard is taken orally as an extended‑release tablet. The tablet should be swallowed whole with a full glass of water and not crushed, chewed, or split, to maintain the intended release profile and therapeutic effect.

Serious adverse events include marked bradycardia, heart block, severe hypotension, and, rarely, heart failure exacerbation. Patients should seek immediate medical attention if they experience fainting, unusually slow pulse, chest pain, or sudden dizziness, as these may signal life‑threatening complications.

Isoptin Retard is contraindicated in patients with known hypersensitivity to verapamil or any component of the formulation, those with severe sinus‑node dysfunction, second‑ or third‑degree AV block without a pacemaker, and patients in cardiogenic shock or severe hypotension. Clinicians must evaluate each individual’s medical history before prescribing.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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