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 intravenous solution for intravenous use. It is used to manage high blood pressure, chest pain and certain rapid heart rhythms 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 Lda.

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Indications & Clinical Uses

Isoptin (verapamil) is employed in cardiovascular conditions that involve excessive calcium‑mediated contraction.

  • Hypertension: lowers blood pressure by relaxing vascular smooth muscle.
  • Angina pectoris: reduces myocardial oxygen demand and improves coronary blood flow.
  • Supraventricular tachyarrhythmias: slows conduction through the AV node to control heart rate.

How It Works

  • Verapamil blocks L‑type calcium channels on cardiac myocytes and vascular smooth‑muscle cells, decreasing intracellular calcium influx. This results in reduced myocardial contractility, slowed atrioventricular nodal conduction, and vasodilation of arterial smooth muscle, collectively lowering blood pressure and alleviating ischemic chest pain.

Side Effects

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

Common Side Effects

  • Headache: mild to moderate intensity.
  • Dizziness or light‑headedness: especially on standing.
  • Peripheral edema: swelling of the ankles or feet.
  • Constipation: reduced bowel motility.
  • 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.
  • Acute myocardial infarction: rare but possible.
  • Hepatic dysfunction: elevated liver enzymes.
  • Allergic reactions: rash, itching, or anaphylaxis.

Precautions & Warnings

Before initiating therapy with Isoptin, consider the following safety measures.

  • Cardiac function: assess for existing heart block or severe left ventricular dysfunction.
  • Blood pressure: monitor baseline and ongoing readings to avoid excessive hypotension.
  • Concomitant drugs: review for agents that also lower heart rate or blood pressure.
  • Renal or hepatic impairment: adjust monitoring as clearance may be affected.
  • Pregnancy and lactation: use only if clearly needed after risk‑benefit evaluation.
  • Store at 2-8°C: keep refrigerated, protect from light, do not freeze.

Avoid Interactions

Verapamil can alter the effects of several other medicines.

Major Interactions (Avoid)

  • Beta‑blockers: may cause profound bradycardia or heart block.
  • Digoxin: increased serum levels leading to toxicity.
  • Strong CYP3A4 inhibitors (e.g., ketoconazole, clarithromycin): raise verapamil concentrations.

Moderate Interactions (Monitor Closely)

  • Antihypertensives (ACE inhibitors, diuretics): additive blood‑pressure lowering.
  • Statins metabolized by CYP3A4 (e.g., simvastatin): may increase statin exposure.
  • Anticonvulsants (phenytoin, carbamazepine): may reduce verapamil effectiveness.

Frequently Asked Questions

Isoptin, containing verapamil, is indicated for the management of hypertension, angina pectoris, and supraventricular tachyarrhythmias. It works by relaxing blood vessels and slowing heart‑rate conduction, helping to control blood pressure, relieve chest pain, and regulate abnormal rapid heart rhythms.

Verapamil blocks L‑type calcium channels on cardiac and vascular smooth‑muscle cells. By reducing calcium entry, it decreases myocardial contractility, dilates arterial vessels, and slows conduction through the atrioventricular node, which together lower blood pressure and control heart‑rate abnormalities.

The specific dose of Isoptin is determined by the prescribing clinician based on the individual’s medical condition, response to therapy, and other factors. Dosage regimens are tailored to each patient and should follow the prescriber’s instructions.

Verapamil should be used during pregnancy or lactation only if the potential benefit justifies the potential risk to the fetus or infant. Healthcare providers evaluate each case individually, and patients should discuss any concerns with their prescriber.

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 (including cold‑chain if needed) and necessary import documentation.

Isoptin (verapamil) is a non‑dihydropyridine calcium‑channel blocker, primarily affecting cardiac conduction and contractility, whereas dihydropyridine agents (e.g., amlodipine) mainly cause peripheral vasodilation. Verapamil is therefore preferred when rate control of supraventricular arrhythmias is needed, while other agents are often chosen for pure antihypertensive effects.

Isoptin should be stored at 2‑8 °C in a refrigerator, protected from light, and must not be frozen or shaken. Keeping the product within this temperature range preserves its stability and potency.

Isoptin is supplied as an intravenous solution and is administered by a healthcare professional through a controlled IV infusion. The rate and duration of infusion are set by the prescriber according to the clinical indication and patient response.

Serious risks include severe bradycardia, heart block, marked hypotension, and rare cases of myocardial infarction or hepatic dysfunction. Patients should be monitored closely for these events, especially during initiation or dose adjustments.

Isoptin is contraindicated in patients with known hypersensitivity to verapamil or other calcium‑channel blockers, those with severe sinus node dysfunction without a pacemaker, advanced atrioventricular block, or uncontrolled heart failure. Clinicians must assess each patient’s medical history before prescribing.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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