Product image of Lanoxin (Digoxin) supplied by GNH India

Lanoxin

Active Ingredient:
Digoxin
Origin:
EU

Lanoxin (Digoxin)

Digoxin, the active ingredient in Lanoxin, is a cardiac glycoside presented as an intravenous solution for injection use. It is employed to control heart rate in atrial fibrillation and flutter and to improve contractility in patients with heart failure.

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

Manufacturer / TM Owner

Aspen Pharma Trading Limited

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Indications & Clinical Uses

Digoxin is a cardiac glycoside used to manage rhythm disorders and heart failure.

  • Atrial fibrillation: Controls ventricular rate by slowing atrioventricular nodal conduction.
  • Atrial flutter: Reduces rapid atrial activity and helps maintain sinus rhythm.
  • Heart failure: Increases myocardial contractility, improving cardiac output and symptoms.

How It Works

  • Digoxin binds to and inhibits the Na⁺/K⁺‑ATPase pump on cardiac myocytes, leading to an increase in intracellular sodium. This alteration reduces the activity of the sodium‑calcium exchanger, causing calcium accumulation inside the cell, which enhances contractile force. In parallel, digoxin augments vagal tone, slowing atrioventricular nodal conduction and stabilizing heart rhythm.

Side Effects

Digoxin may cause a range of adverse reactions, from mild to life‑threatening.

Common Side Effects

  • Nausea: mild to moderate gastrointestinal upset.
  • Vomiting: occasional episodes after dosing.
  • Diarrhea: loose stools, often transient.
  • Fatigue: generalized tiredness.
  • Blurred vision: visual disturbances, sometimes with a yellow‑green tint.
  • Headache: mild cranial discomfort.

Serious or Rare Side Effects

  • Cardiac arrhythmias: potentially fatal rhythm disturbances.
  • Severe bradycardia: markedly reduced heart rate.
  • Heart block: impaired electrical conduction.
  • Hyperkalemia: elevated serum potassium levels.
  • Pulmonary edema: fluid accumulation in lungs.
  • Anaphylactic reaction: rare but severe hypersensitivity.

Precautions & Warnings

When using digoxin, careful monitoring and patient assessment are essential.

  • Serum level monitoring: Check digoxin concentrations regularly to avoid toxicity.
  • Renal function assessment: Adjust dosing in patients with impaired kidney function.
  • Electrolyte balance: Correct hypokalemia, hypomagnesemia, and hypercalcemia before therapy.
  • Pregnancy safety: Use only if potential benefit justifies potential fetal risk (Category C).
  • Contraindications: Avoid in patients with ventricular arrhythmias or advanced AV block.
  • Store at controlled room temperature: Keep in original packaging, protect from moisture and light.

Avoid Interactions

Digoxin interacts with several medicines that can alter its plasma concentration or cardiac effects.

Major Interactions (Avoid)

  • Amiodarone: Increases digoxin levels, raising toxicity risk.
  • Quinidine: Potentiates digoxin's effects on conduction.
  • Verapamil: Enhances digoxin concentration and AV‑node slowing.
  • Diltiazem: Similar effect as verapamil, may cause bradyarrhythmias.
  • Rifampin: Decreases digoxin levels, reducing efficacy.

Moderate Interactions (Monitor Closely)

  • Diuretics (e.g., furosemide): May cause electrolyte disturbances that predispose to toxicity.
  • ACE inhibitors: Can increase serum potassium, affecting cardiac rhythm.
  • Beta‑blockers: Additive bradycardic effect, requiring rate monitoring.

Frequently Asked Questions

Lanoxin, whose active ingredient is digoxin, is prescribed for atrial fibrillation, atrial flutter and heart failure. In these conditions it helps control heart rate, improve cardiac contractility, and stabilize rhythm, providing symptomatic relief and reducing the risk of complications.

Digoxin inhibits the Na⁺/K⁺‑ATPase pump on heart muscle cells, leading to increased intracellular sodium. This change reduces the sodium‑calcium exchanger activity, causing calcium buildup that strengthens heart contractions. Additionally, digoxin enhances vagal tone, slowing conduction through the atrioventricular node and helping to regulate abnormal heart rhythms.

The specific dose of Lanoxin is individualized by the prescribing clinician based on the patient’s age, weight, renal function, electrolyte status and therapeutic response. Dosage adjustments are made after evaluating serum digoxin concentrations and clinical effect, so the exact regimen varies from case to case.

Lanoxin is classified as Pregnancy Category C, meaning it should be used only if the potential benefit justifies any potential risk to the fetus. Limited data exist for breastfeeding, and the drug may pass into breast milk. Healthcare providers should weigh risks and discuss alternatives when treating pregnant or nursing patients.

To place an order, submit an enquiry on the Lanoxin 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 any cold‑chain requirements) and necessary import documentation.

Unlike many anti‑arrhythmics that primarily block ion channels, Lanoxin is a cardiac glycoside that increases contractility and slows AV‑node conduction. Its unique mechanism offers benefits in heart failure where inotropic support is needed, but it requires careful monitoring for toxicity, a consideration less prominent with many newer class III agents.

Lanoxin should be stored at controlled room temperature, below 25 °C, in its original container. The packaging protects the product from moisture and light, helping maintain potency and sterility until the point of use.

Lanoxin is supplied as an intravenous solution and is administered by a healthcare professional directly into a vein. The injection is given over a short period, typically as a loading dose followed by maintenance dosing, according to the prescriber’s instructions and the patient’s clinical status.

The most serious risks include digoxin toxicity, which can manifest as life‑threatening cardiac arrhythmias, severe bradycardia, heart block, and hyperkalemia. Early signs such as visual disturbances, nausea, and confusion should prompt immediate medical evaluation to prevent progression to critical events.

Lanoxin is contraindicated in patients with ventricular arrhythmias, advanced atrioventricular block without a pacemaker, and those with known hypersensitivity to digoxin or other cardiac glycosides. Caution is also advised for individuals with severe renal impairment, uncontrolled electrolyte abnormalities, or pregnancy unless benefits outweigh risks.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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