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

Isoptin

Active Ingredient:
Verapamil Hydrochloride
Origin:
EU

Isoptin (Verapamil Hydrochloride)

Verapamil, the active ingredient in Isoptin, 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 India supplies Isoptin as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Viatris As

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Indications & Clinical Uses

Isoptin (verapamil) acts on the cardiovascular system to control blood pressure, relieve angina, and regulate heart rhythm.

  • Hypertension: lowers systemic arterial pressure by vasodilation and reduced cardiac output.
  • Angina pectoris: decreases myocardial oxygen demand and improves coronary blood flow, reducing chest pain episodes.
  • Supraventricular tachycardia: slows atrioventricular nodal conduction to restore normal heart rate.
  • Other arrhythmias: stabilises cardiac electrical activity in various rhythm disturbances.

How It Works

  • Verapamil blocks 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 angina while controlling abnormal heart rhythms.

Side Effects

Common Side Effects

  • Headache: mild to moderate pain often occurring early in therapy.
  • Dizziness or light‑headedness: related to blood pressure reduction.
  • Constipation: slowed gastrointestinal motility.
  • Peripheral edema: swelling of lower limbs due to vasodilation.

Serious or Rare Side Effects

  • Bradycardia: markedly slow heart rate requiring medical attention.
  • Hypotension: significant drop in blood pressure that may cause fainting.
  • AV block or other conduction disturbances: impaired electrical signaling in the heart.
  • Severe allergic reactions: rash, swelling, or anaphylaxis.
  • Liver enzyme elevations: abnormal hepatic function tests.

Precautions & Warnings

Before initiating verapamil therapy, consider the following precautions.

  • Blood pressure monitoring: regularly assess to avoid excessive hypotension.
  • Cardiac function evaluation: review ECG and heart rate, especially in patients with existing conduction disorders.
  • Concomitant beta‑blocker use: adjust doses to prevent additive bradycardia.
  • Hepatic impairment: use lower doses and monitor liver function tests.
  • Abrupt discontinuation: taper gradually to reduce risk of rebound hypertension.
  • Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Avoid Interactions

Verapamil may interact with several medicines, requiring careful management.

Major Interactions (Avoid)

  • Beta‑blockers: combined use can cause severe bradycardia and hypotension.
  • Digoxin: verapamil increases digoxin serum levels, raising toxicity risk.
  • Strong CYP3A4 inhibitors (e.g., ketoconazole): may elevate verapamil concentrations leading to toxicity.

Moderate Interactions (Monitor Closely)

  • CYP3A4 inducers (e.g., rifampin): may reduce verapamil effectiveness.
  • Diuretics: concurrent use can exacerbate electrolyte imbalances and affect blood pressure control.

Frequently Asked Questions

Isoptin, containing verapamil, is prescribed for hypertension, angina pectoris, and certain cardiac arrhythmias such as supraventricular tachycardia. It helps lower blood pressure, relieve chest pain, and control abnormal heart rhythms by acting on calcium channels in the heart and blood vessels.

Verapamil blocks L‑type calcium channels in cardiac muscle and vascular smooth muscle. This reduces calcium entry into cells, leading to decreased heart contractility, slowed atrioventricular nodal conduction, and dilation of peripheral arteries, which together lower blood pressure and improve myocardial oxygen balance.

The appropriate dose of Isoptin is determined by the prescribing healthcare professional based on the individual’s medical condition, response to therapy, and other factors. Patients should follow the prescriber’s instructions and not adjust the dose without medical guidance.

Safety of verapamil during pregnancy or lactation has not been definitively established. Healthcare providers will weigh potential benefits against possible risks before prescribing it to pregnant or nursing individuals. Patients should discuss any concerns with their doctor.

To request 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 agents like amlodipine are dihydropyridines that mainly cause peripheral vasodilation. Verapamil is often chosen for its anti‑arrhythmic properties, while others 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 excessive heat to maintain its stability and potency.

Isoptin is taken orally, usually with a glass of water. The tablet should be swallowed whole and not crushed or chewed unless specifically instructed by a healthcare professional. Dosing times and frequency are set by the prescriber.

Serious risks include marked bradycardia, severe hypotension, atrioventricular block, and rare allergic reactions such as anaphylaxis. Patients should seek immediate medical attention if they experience fainting, very slow heart rate, or signs of a severe allergic response.

Isoptin is contraindicated in patients with known hypersensitivity to verapamil, severe hypotension, advanced heart block without a pacemaker, and certain forms of cardiogenic shock. Individuals with significant hepatic impairment or those taking interacting medications should discuss alternatives with their physician.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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