Product image of Metoject (Methotrexate) supplied by GNH India

Metoject

Active Ingredient:
Methotrexate
Origin:
EU

Metoject (Methotrexate)

Methotrexate, the active ingredient in Metoject, is an antimetabolite (folate antagonist) presented as a subcutaneous formulation for injection use. It is employed to modify disease activity in rheumatoid arthritis, manage severe psoriasis, and treat certain cancers such as acute lymphoblastic leukemia and non‑Hodgkin lymphoma, as well as to resolve ectopic pregnancy.

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

Manufacturer / TM Owner

Medac Gesellschaft Für Klinische Spezialpräparate Mbh (Wedel)

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Indications & Clinical Uses

Methotrexate acts as a folate antagonist used across several disease families, primarily inflammatory and oncologic conditions.

  • Rheumatoid arthritis: reduces disease activity and joint inflammation.
  • Psoriasis: limits skin cell proliferation and improves lesions.
  • Acute lymphoblastic leukemia: interferes with malignant cell replication.
  • Non‑Hodgkin lymphoma: suppresses growth of lymphoma cells.
  • Ectopic pregnancy: terminates trophoblastic tissue to avoid surgical intervention.

How It Works

  • Methotrexate inhibits dihydrofolate reductase, blocking the conversion of dihydrofolate to tetrahydrofolate. This reduction limits the synthesis of purine nucleotides and thymidylate, impairing DNA, RNA and protein production. The resulting inhibition of cell division particularly affects rapidly proliferating immune cells and malignant cells, providing anti‑inflammatory and antineoplastic effects.

Side Effects

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

Common Side Effects

  • Nausea or vomiting.
  • Fatigue or general weakness.
  • Oral mucosal ulceration (mouth sores).
  • Mild elevation of liver enzymes.

Serious or Rare Side Effects

  • Severe hepatotoxicity or liver fibrosis.
  • Pulmonary fibrosis or interstitial pneumonitis.
  • Life‑threatening bone marrow suppression leading to pancytopenia.
  • Acute kidney injury or renal failure.
  • Severe cutaneous reactions such as Stevens‑Johnson syndrome.
  • Opportunistic infections due to immunosuppression.

Precautions & Warnings

Methotrexate requires careful monitoring and specific safety measures before and during therapy.

  • Pregnancy avoidance: contraindicated in pregnancy (Category X) and requires effective contraception.
  • Renal function: assess creatinine clearance before initiation and periodically thereafter.
  • Hepatic monitoring: perform baseline and regular liver function tests.
  • Hematologic surveillance: obtain complete blood counts to detect myelosuppression.
  • Drug interaction review: evaluate concomitant medications for potential additive toxicity.
  • Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Avoid Interactions

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

Major Interactions (Avoid)

  • Nonsteroidal anti‑inflammatory drugs (NSAIDs): increase risk of renal toxicity and gastrointestinal ulceration.
  • Trimethoprim‑sulfamethoxazole: potentiate myelosuppression.
  • Live vaccines: heightened risk of infection due to immunosuppression.
  • Pemetrexed: additive folate antagonism leading to severe toxicity.

Moderate Interactions (Monitor Closely)

  • Proton pump inhibitors: may affect methotrexate absorption and increase serum levels.
  • Phenytoin: can reduce methotrexate efficacy by enhancing hepatic metabolism.
  • Azathioprine: combined use may increase bone‑marrow suppression.

Frequently Asked Questions

Metoject, containing methotrexate, is prescribed for rheumatoid arthritis, severe plaque psoriasis, acute lymphoblastic leukemia, non‑Hodgkin lymphoma, and for medical management of ectopic pregnancy. It works by modulating immune activity and inhibiting rapid cell division in these disease states.

Methotrexate blocks the enzyme dihydrofolate reductase, preventing the formation of tetrahydrofolate needed for DNA and RNA synthesis. This action reduces the proliferation of immune cells and malignant cells, providing anti‑inflammatory effects in arthritis and psoriasis and cytotoxic effects in certain cancers.

The specific dose and dosing schedule of Metoject are determined by the prescribing clinician based on the individual’s condition, weight, renal and hepatic function, and treatment response. Patients should follow the prescriber’s instructions and not adjust the dose on their own.

Metoject is classified as Pregnancy Category X, meaning it is contraindicated in pregnancy because it can cause fetal harm. It is also not recommended while breastfeeding, as methotrexate can be excreted in breast milk and may affect the infant. Effective contraception is required during treatment.

To request Metoject, 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 (including cold‑chain if needed) and necessary import documentation.

Metoject is a subcutaneous formulation of methotrexate, offering rapid absorption and consistent bioavailability compared with oral tablets, which can have variable absorption. This route may be preferred for patients who need higher systemic exposure or who experience gastrointestinal side effects with oral dosing.

Metoject should be stored at 2‑8 °C (refrigerated). Keep the product in its original packaging, protect it from light, and avoid freezing or shaking the vial. Do not store at room temperature for extended periods, as stability may be compromised.

Metoject is given by subcutaneous injection, typically into the abdomen or thigh. The injection is performed by a healthcare professional or a trained patient using aseptic technique. The exact injection site, volume and frequency are prescribed by the treating clinician.

Serious risks include severe liver toxicity, pulmonary fibrosis, life‑threatening bone‑marrow suppression, acute kidney injury, and severe infections. Patients should be monitored regularly with liver function tests, pulmonary assessments, renal function checks and complete blood counts to detect early signs of toxicity.

Metoject should not be used by pregnant individuals, those with severe renal or hepatic impairment, patients with known hypersensitivity to methotrexate, or individuals receiving live vaccines. It is also contraindicated in patients with uncontrolled infections or pre‑existing severe bone‑marrow disorders.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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