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 used to prevent organ transplant rejection and to manage autoimmune conditions such as rheumatoid arthritis, inflammatory bowel disease, and systemic lupus erythematosus.

GNH India supplies Imuran 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

Azathioprine is employed in several immune‑mediated conditions to suppress abnormal immune activity.

  • Organ transplant rejection: helps prevent graft rejection by inhibiting immune cell proliferation.
  • Rheumatoid arthritis: reduces joint inflammation and disease progression.
  • Inflammatory bowel disease (Crohn's disease, ulcerative colitis): maintains remission and decreases intestinal inflammation.
  • Systemic lupus erythematosus: controls disease activity and flares.

How It Works

  • Azathioprine is a prodrug that is converted intracellularly to 6‑mercaptopurine, which interferes with purine nucleotide synthesis. By inhibiting the formation of DNA and RNA precursors, it suppresses the proliferation of rapidly dividing lymphocytes, thereby reducing the immune response that drives transplant rejection and autoimmune inflammation.

Side Effects

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

Common Side Effects

  • Nausea: mild gastrointestinal upset.
  • Vomiting: occasional episodes.
  • Diarrhea: loose stools.
  • Decreased white blood cell count: mild leukopenia.
  • Elevated liver enzymes: mild transaminase rise.

Serious or Rare Side Effects

  • Severe bone marrow suppression: pancytopenia.
  • Hepatotoxicity: significant liver injury.
  • Increased infection risk: opportunistic infections.
  • Pancreatitis: abdominal pain with elevated enzymes.
  • Malignancy: rare increased risk of lymphomas or skin cancers.

Precautions & Warnings

When prescribing azathioprine, several safety considerations should be observed.

  • Baseline testing: obtain complete blood count and liver function tests before initiation.
  • Monitoring: perform regular CBC and LFTs to detect hematologic or hepatic toxicity.
  • Infection risk: assess for active infections and vaccinate appropriately before treatment.
  • Pregnancy: avoid use unless benefits outweigh risks; category D.
  • Drug interactions: review concomitant medications that affect thiopurine metabolism.
  • Store at ambient temperature: keep tablets in original container, protect from moisture and light.

Avoid Interactions

Azathioprine interacts with several agents that can alter its efficacy or safety.

Major Interactions (Avoid)

  • Allopurinol or febuxostat: can cause severe bone marrow suppression.
  • Thiopurine methyltransferase (TPMT) inhibitors: increase risk of toxicity.
  • Live vaccines: may lead to uncontrolled infection.

Moderate Interactions (Monitor Closely)

  • Warfarin: azathioprine may enhance anticoagulant effect.
  • Mycophenolate mofetil: additive immunosuppression increasing infection risk.
  • Ribavirin: potential for enhanced hematologic toxicity.

Frequently Asked Questions

Imuran (azathioprine) is prescribed to prevent organ transplant rejection and to treat several autoimmune disorders, including rheumatoid arthritis, inflammatory bowel disease such as Crohn's disease and ulcerative colitis, and systemic lupus erythematosus. It works by dampening the immune response that drives these conditions.

Azathioprine is a prodrug that is converted inside cells to 6‑mercaptopurine. This metabolite blocks the synthesis of purine nucleotides, which are essential building blocks for DNA and RNA. By limiting nucleotide production, the drug reduces the proliferation of rapidly dividing immune cells, thereby suppressing abnormal immune activity.

The dose of Imuran is individualized by the prescribing clinician. Factors such as the specific condition being treated, patient weight, renal and hepatic function, and laboratory monitoring results (e.g., blood counts) guide the selection of an appropriate dose. Patients should follow the prescriber’s instructions exactly.

Azathioprine is classified as pregnancy category D, indicating evidence of risk to the fetus. It may be used only when the potential benefit justifies the risk. Breastfeeding is generally not recommended while on azathioprine because the drug can be excreted in milk. Consultation with a healthcare professional is essential.

To order Imuran, submit an enquiry on the product page at gnhindia.com, specifying the required quantity. GNH India supplies hospitals, pharmacies and procurement teams worldwide. After the request, the sales team will verify trade or institutional credentials, then provide pricing, availability, shipping details and any necessary import documentation.

Both Imuran (azathioprine) and mycophenolate mofetil are oral immunosuppressants used in transplant and autoimmune settings. Azathioprine acts by inhibiting purine synthesis via 6‑mercaptopurine, while mycophenolate blocks inosine monophosphate dehydrogenase, a different step in the pathway. Their safety profiles differ; azathioprine is more associated with bone‑marrow suppression, whereas mycophenolate carries a higher risk of gastrointestinal upset.

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 do not use if the packaging is damaged or the tablets appear discolored.

Imuran is taken orally as a tablet. The tablet should be swallowed whole with a glass of water. It may be taken with or without food, but patients should follow any specific instructions from their prescriber regarding timing relative to meals.

The most serious adverse effects of Imuran include severe bone‑marrow suppression leading to pancytopenia, significant liver injury (hepatotoxicity), increased susceptibility to serious infections, pancreatitis, and a rare but heightened risk of certain malignancies such as lymphomas or skin cancers. Regular laboratory monitoring helps detect these risks early.

Imuran is contraindicated in individuals with known hypersensitivity to azathioprine or any of its components, those with severe bone‑marrow suppression, active uncontrolled infections, and patients who are pregnant unless the therapeutic benefit outweighs the potential fetal risk. It should also be avoided in patients with severe hepatic impairment.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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