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 injection for subcutaneous use. It is employed to treat autoimmune disorders and certain cancers in adult patients.
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 on rapidly dividing cells and modulates immune pathways, making it useful for several disease groups.

  • Rheumatoid arthritis: reduces joint inflammation and slows structural damage.
  • Psoriasis: diminishes skin lesions and plaque formation.
  • Acute lymphoblastic leukemia: interferes with malignant cell proliferation.
  • Other malignancies: used as part of combination regimens for various solid tumours.

How It Works

  • Methotrexate inhibits dihydrofolate reductase, preventing the conversion of dihydrofolate to tetrahydrofolate. This blockade reduces the synthesis of purine nucleotides and thymidylate, leading to impaired DNA replication and cell division, particularly in rapidly proliferating immune and cancer cells.

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).
  • Elevated liver enzymes.
  • Mild decrease in white blood cell count.

Serious or Rare Side Effects

  • Severe hepatotoxicity or liver fibrosis.
  • Pulmonary toxicity, including interstitial pneumonitis.
  • Significant bone marrow suppression leading to anemia or neutropenia.
  • Life‑threatening infections due to immunosuppression.
  • Anaphylactic or severe allergic reactions.

Precautions & Warnings

Methotrexate requires careful monitoring and specific safety measures.

  • Liver function monitoring: perform baseline and periodic liver enzyme tests.
  • Hematologic monitoring: check complete blood counts regularly.
  • Pregnancy avoidance: contraindicated in pregnancy (Category X) and requires effective contraception.
  • Breastfeeding restriction: not recommended while nursing.
  • Drug interactions: review concomitant medications for potential additive toxicity.
  • Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Avoid Interactions

Methotrexate can interact with several drug classes, influencing efficacy or toxicity.

Major Interactions (Avoid)

  • Other folate antagonists (e.g., pemetrexed) – may increase toxicity.
  • High‑dose non‑steroidal anti‑inflammatory drugs – raise risk of renal impairment.
  • Live vaccines – heightened risk of infection.

Moderate Interactions (Monitor Closely)

  • Sulfonamide antibiotics – may enhance myelosuppression.
  • Proton pump inhibitors – can alter renal clearance.
  • Alcohol consumption – increases hepatic toxicity risk.
  • Trimethoprim‑sulfamethoxazole – may potentiate bone‑marrow suppression.

Frequently Asked Questions

Metoject contains methotrexate, which is prescribed for rheumatoid arthritis, moderate to severe plaque psoriasis, acute lymphoblastic leukemia, and as part of combination regimens for various other malignancies. The drug works by suppressing immune activity and inhibiting cancer cell growth.

Methotrexate blocks the enzyme dihydrofolate reductase, reducing the production of tetrahydrofolate needed for DNA synthesis. This limits the proliferation of rapidly dividing cells, such as immune cells involved in inflammation and malignant tumor cells.

The dose of Metoject is individualized by the prescribing clinician based on the specific indication, patient weight, renal function, and treatment response. Only a qualified health professional should determine the appropriate dosing schedule.

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

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 import documentation.

Compared with biologic agents, methotrexate is a small‑molecule antimetabolite that can be administered subcutaneously and is generally less expensive. It has a well‑characterized safety profile but requires regular monitoring of liver function and blood counts, whereas biologics target specific cytokines and have different monitoring requirements.

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.

Metoject is given by subcutaneous injection, typically into the abdomen or thigh. The injection site should be rotated to reduce local irritation. Administration is performed by a healthcare professional or a trained patient following aseptic technique.

Serious risks include severe liver toxicity, pulmonary fibrosis, profound bone‑marrow suppression leading to anemia or infection, and rare but life‑threatening allergic reactions. Patients should be monitored closely for signs of these complications and report any concerning symptoms promptly.

Metoject is contraindicated in pregnant women, nursing mothers, and individuals with known hypersensitivity to methotrexate. It should also be avoided in patients with severe renal or hepatic impairment, uncontrolled infections, or those receiving other folate‑antagonist therapies without appropriate supervision.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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