Product image of Imuran (Azathioprine) supplied by GNH India

Imuran

Active Ingredient:
Azathioprine
Origin:
EU

Imuran (Azathioprine)

Azathioprine, the active ingredient in Imuran, is an immunosuppressant (antimetabolite) presented as a tablet for oral use. It is employed to prevent organ transplant rejection and to manage autoimmune disorders such as rheumatoid arthritis and inflammatory bowel disease, including Crohn's disease and ulcerative colitis, in adult patients.

GNH India supplies Imuran as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, transplant centres, pharmacies and clinics worldwide. The company adheres to stringent quality standards and provides reliable logistics for global distribution.

Manufacturer / TM Owner

Aspen Pharma Trading Limited

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Indications & Clinical Uses

Azathioprine is employed in the management of immune‑mediated conditions where suppression of lymphocyte activity is required.

  • Organ transplantation prophylaxis: helps prevent rejection of transplanted organs by suppressing the immune response.
  • Rheumatoid arthritis: reduces joint inflammation and disease progression in adult patients.
  • Crohn's disease: controls intestinal inflammation and maintains remission in moderate to severe cases.
  • Ulcerative colitis: diminishes colonic inflammation and supports sustained remission in affected individuals.

How It Works

  • Azathioprine is a purine analog that is metabolized to 6‑mercaptopurine, which interferes with de novo purine synthesis. By incorporating into DNA and RNA, it inhibits the proliferation of rapidly dividing T and B lymphocytes, leading to reduced immune cell activation and a broad suppression of cellular immunity. The drug also diminishes cytokine production and impairs antigen presentation, further contributing to its immunosuppressive effect.

Side Effects

Azathioprine may cause a range of adverse reactions, varying from mild to potentially life‑threatening.

Common Side Effects

  • Nausea
  • Vomiting
  • Loss of appetite
  • Mild leukopenia
  • Rash
  • Fever

Serious or Rare Side Effects

  • Severe bone marrow suppression (agranulocytosis, anemia)
  • Hepatotoxicity
  • Pancreatitis
  • Increased susceptibility to infections
  • Malignancies such as lymphoma
  • Hypersensitivity reactions including Stevens‑Johnson syndrome

Precautions & Warnings

When using Imuran, careful monitoring and specific precautions are recommended to minimize risks.

  • Monitor blood counts: regular CBC testing to detect leukopenia or anemia.
  • Assess liver function: periodic liver enzyme tests are recommended.
  • Screen for infections: evaluate for active infections before initiating therapy.
  • Avoid use in pregnancy: drug is classified Category D and may cause fetal harm.
  • Store at ambient temperature: keep below 25°C in original packaging, protect from moisture.

Avoid Interactions

Azathioprine interacts with several medicines; awareness of major and moderate interactions helps prevent adverse outcomes.

Major Interactions (Avoid)

  • Allopurinol: may increase azathioprine toxicity, leading to severe bone marrow suppression.
  • Live vaccines: concurrent use can result in uncontrolled infection.
  • Warfarin: azathioprine may enhance anticoagulant effect, increasing bleeding risk.

Moderate Interactions (Monitor Closely)

  • Rituximab: combined immunosuppression may raise infection risk.
  • Sulfasalazine: may increase risk of myelosuppression.
  • ACE inhibitors: monitor renal function and blood pressure.

Frequently Asked Questions

Imuran (azathioprine) is prescribed to prevent rejection after organ transplantation and to manage autoimmune diseases such as rheumatoid arthritis, Crohn's disease and ulcerative colitis. It works by dampening the immune system's activity, helping to control inflammation and disease progression in these conditions.

Azathioprine is converted in the body to 6‑mercaptopurine, which blocks the synthesis of purine nucleotides needed for DNA and RNA production. This inhibition limits the proliferation of T and B lymphocytes, reducing immune cell activation and providing broad immunosuppression.

The appropriate dose of Imuran is individualized by the prescribing clinician based on the specific condition, patient weight, renal and hepatic function, and laboratory monitoring results. Dosage adjustments are made to achieve therapeutic effect while minimizing toxicity.

Imuran is classified as Pregnancy Category D, indicating evidence of fetal risk. It should only be used during pregnancy if the potential benefit justifies the risk. Limited data are available for breastfeeding; the drug may pass into breast milk, so a healthcare professional should evaluate safety before use.

To request Imuran, 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.

Compared with alternatives such as mycophenolate mofetil or methotrexate, azathioprine offers a well‑established efficacy profile for transplant prophylaxis and several autoimmune diseases. Its side‑effect spectrum differs, with a higher risk of bone‑marrow suppression but lower incidence of gastrointestinal toxicity seen with some other agents.

Imuran tablets should be stored at ambient temperature, below 25 °C, in the original container to protect them from moisture and light. Keep the medication out of reach of children and avoid storing in bathrooms or other humid environments.

Imuran is taken orally as a tablet, usually with food or a glass of water to reduce gastrointestinal irritation. The exact timing and whether it should be taken with meals are determined by the prescribing physician based on individual tolerance and treatment plan.

The most serious risks include severe bone‑marrow suppression leading to anemia, leukopenia or thrombocytopenia; liver toxicity; pancreatitis; increased susceptibility to opportunistic infections; and a potential heightened risk of certain malignancies such as lymphoma. Regular laboratory monitoring is essential.

Imuran is contraindicated in patients with known hypersensitivity to azathioprine or its metabolites, those who are pregnant unless benefits outweigh risks, individuals with active severe infections, and patients with significant hepatic impairment. It should also be used with caution in the elderly and in those with pre‑existing bone‑marrow disorders.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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