Product image of Leflon (Leflunomide) supplied by GNH India

Leflon

Active Ingredient:
Leflunomide
Origin:
EU

Leflon (Leflunomide)

Leflunomide, the active ingredient in Leflon, is an immunomodulatory agent presented as an oral tablet for oral use. It treats rheumatoid arthritis and psoriatic arthritis in adult patients, helping to reduce inflammation and slow disease progression.

GNH India supplies Leflon as a licensed, GDP-compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Bausch Health Ireland Limited

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Indications & Clinical Uses

Leflunomide is a disease-modifying antirheumatic drug (DMARD) used in autoimmune joint disorders.

  • Rheumatoid arthritis: reduces joint inflammation, pain, and slows structural damage.
  • Psoriatic arthritis: improves skin lesions and joint symptoms, helping to control disease activity.

How It Works

  • Leflunomide inhibits the mitochondrial enzyme dihydroorotate dehydrogenase, which is essential for de novo pyrimidine synthesis. By limiting pyrimidine availability, the drug suppresses proliferation of activated T‑lymphocytes, thereby reducing the autoimmune response that drives joint inflammation and damage.

Side Effects

Leflon may cause a range of adverse reactions, from mild to severe.

Common Side Effects

  • Diarrhoea: loose stools occurring intermittently.
  • Nausea: feeling of stomach upset, sometimes with vomiting.
  • Headache: mild to moderate pain in the head region.
  • Hypertension: elevated blood pressure readings.

Serious or Rare Side Effects

  • Hepatotoxicity: significant liver enzyme elevations or liver injury.
  • Severe infection: increased susceptibility to bacterial, viral or fungal infections.
  • Pulmonary toxicity: interstitial lung disease or pneumonitis, presenting with cough and breathlessness.

Precautions & Warnings

Before initiating Leflon, several safety considerations are recommended.

  • Liver monitoring: perform baseline and periodic liver function tests.
  • Blood pressure: monitor regularly, especially in patients with hypertension.
  • Pregnancy: contraindicated; avoid use in women of child‑bearing potential.
  • Breastfeeding: not recommended as drug may be excreted in milk.
  • Infection risk: assess for active infections before starting therapy.

Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Avoid Interactions

Leflon can interact with several medicines; awareness of the interaction level is essential.

Major Interactions (Avoid)

  • Warfarin: increased anticoagulant effect, risk of bleeding.
  • Teriflunomide: additive toxicity, especially hepatic.
  • Live vaccines: may cause uncontrolled infection.

Moderate Interactions (Monitor Closely)

  • Methotrexate: enhanced immunosuppression, monitor blood counts.
  • Statins: potential for increased muscle toxicity, observe for myalgia.

Frequently Asked Questions

Leflon contains leflunomide, a disease-modifying antirheumatic drug indicated for the treatment of rheumatoid arthritis and psoriatic arthritis in adult patients. It helps to reduce joint inflammation, pain, and slows the progression of structural damage associated with these autoimmune conditions.

Leflunomide blocks the enzyme dihydroorotate dehydrogenase, which is required for the synthesis of pyrimidine nucleotides. This inhibition limits the proliferation of activated T‑cells, thereby dampening the immune response that drives inflammation and joint destruction in rheumatoid and psoriatic arthritis.

The dosage of Leflon is individualized by the prescribing clinician based on the patient’s clinical status, laboratory results, and tolerance. Physicians typically start with a loading dose followed by a maintenance dose, but the exact regimen should be confirmed with the treating healthcare professional.

Leflon is classified as pregnancy category X, meaning it is contraindicated during pregnancy because of a high risk of fetal harm. It is also not recommended for breastfeeding mothers, as leflunomide can be excreted in breast milk and may affect the infant.

To order Leflon, 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.

The most common alternative to leflunomide is methotrexate, another DMARD. While both reduce disease activity, leflunomide is taken orally once daily and may be preferred in patients who cannot tolerate methotrexate’s weekly dosing or its hepatic profile. Choice depends on individual efficacy, safety, and physician judgment.

Leflon should be stored at room temperature, below 25 °C, in its original packaging to protect it from moisture and light. Keep the tablets out of reach of children and do not use the product after the expiration date printed on the label.

Leflon is administered orally as a tablet, usually swallowed whole with a glass of water. It can be taken with or without food, but patients should follow the prescribing physician’s instructions regarding timing and any accompanying medications.

The most serious adverse events associated with Leflon include liver toxicity (elevated liver enzymes or hepatitis), severe infections due to immunosuppression, and pulmonary toxicity such as interstitial lung disease. Patients should report symptoms like jaundice, persistent fever, cough, or shortness of breath promptly.

Leflon is contraindicated in pregnant women, individuals with severe liver disease, patients with known hypersensitivity to leflunomide or its excipients, and those with active, uncontrolled infections. Caution is also advised for patients with a history of pulmonary disease or significant hypertension.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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