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 in the management of hypertension, angina pectoris, and certain cardiac arrhythmias, particularly in adult patients requiring cardiovascular rate control.
GNH India supplies Isoptin as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Viatris Ab

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Indications & Clinical Uses

  • Isoptin, a calcium channel blocker, is used to treat conditions related to elevated vascular tone and abnormal cardiac conduction.
  • Hypertension: lowers blood pressure by dilating peripheral arteries.
  • Angina pectoris: reduces myocardial oxygen demand and improves coronary blood flow.
  • Supraventricular tachyarrhythmias: slows atrioventricular nodal conduction to control heart rate.

How It Works

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

Side Effects

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

Common Side Effects

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

Serious or Rare Side Effects

  • Bradycardia: markedly slowed heart rate.
  • Heart block: impaired electrical conduction.
  • Severe hypotension: dangerous drop in blood pressure.
  • Hepatotoxicity: abnormal liver function tests.
  • Allergic reactions: rash, itching, or swelling.
  • Worsening heart failure: fluid retention or pulmonary edema.

Precautions & Warnings

  • Before initiating therapy with Isoptin, consider the following safety measures.
  • Cardiac function assessment: evaluate for existing heart failure or conduction disorders.
  • Blood pressure monitoring: check baseline and periodic readings.
  • Electrolyte balance: correct significant hypo‑ or hyper‑kalemia.
  • Drug history review: avoid concurrent use with other negative‑inotropic agents.
  • Pregnancy and lactation: discuss risks with a healthcare professional.
  • Store at ambient temperature: keep below 25 °C, in the original container, protected from moisture and light.

Avoid Interactions

Verapamil interacts with several medicines that can alter its efficacy or safety profile.

Major Interactions (Avoid)

  • Beta‑blockers (e.g., propranolol): risk of severe bradycardia.
  • Digoxin: increased serum levels leading to toxicity.
  • CYP3A4 inhibitors (e.g., ketoconazole, clarithromycin): markedly raise verapamil concentrations.

Moderate Interactions (Monitor Closely)

  • Statins metabolized by CYP3A4 (e.g., simvastatin): may increase statin exposure.
  • Antidiabetic agents (e.g., insulin, sulfonylureas): enhanced hypoglycemic effect.
  • Diuretics: additive hypotensive effect.
  • Antihypertensives (e.g., ACE inhibitors): may require dose adjustment.

Frequently Asked Questions

Isoptin, containing verapamil, is prescribed for high blood pressure (hypertension), chest pain due to reduced blood flow to the heart (angina pectoris), and certain rapid heart rhythms that originate above the ventricles (supraventricular tachyarrhythmias).

Verapamil blocks L‑type calcium channels in the heart and blood vessels, limiting calcium entry into cells. This reduces the force of heart muscle contraction, slows electrical conduction through the atrioventricular node, and relaxes arterial smooth muscle, leading to lower blood pressure and decreased cardiac workload.

The appropriate dose of Isoptin is determined by the prescribing clinician based on the individual’s medical condition, response to therapy, and any concomitant medications. Patients should follow the dosage instructions provided by their healthcare professional.

Safety of verapamil during pregnancy or lactation has not been definitively established. Healthcare providers should weigh potential benefits against possible risks and discuss alternative options when appropriate.

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, distinguished by its pronounced effects on cardiac conduction and contractility, whereas dihydropyridine agents (e.g., amlodipine) primarily cause peripheral vasodilation. Choice of agent depends on the therapeutic goal and patient tolerance.

Isoptin should be stored at ambient temperature, below 25 °C, in its original packaging to protect it from moisture and light. Keep the product out of reach of children.

Isoptin is taken orally, usually with a glass of water. It may be taken with or without food, but patients should follow the specific instructions given by their prescriber to maintain consistent blood levels.

Serious risks include marked slowing of the heart rate (bradycardia), heart block, severe low blood pressure (hypotension), and worsening of heart failure. Patients should seek immediate medical attention if they experience fainting, severe dizziness, or rapid swelling of the legs.

Isoptin is contraindicated in patients with known hypersensitivity to verapamil, severe hypotension, advanced heart block without a pacemaker, and certain forms of heart failure. Clinicians should also avoid use in individuals taking interacting medications that could cause dangerous cardiac effects.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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