Product image of Metex (Methotrexate) supplied by GNH India

Metex

Active Ingredient:
Methotrexate
Origin:
EU

Metex (Methotrexate)

Methotrexate, the active ingredient in Metex, is an antimetabolite presented as a subcutaneous formulation for subcutaneous use. It modulates immune activity and inhibits rapidly dividing cells, providing clinical benefit across autoimmune and oncologic conditions. It is employed to manage rheumatoid arthritis, psoriasis, acute lymphoblastic leukemia and other malignancies in appropriate patients.

GNH India supplies Metex as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide. The company adheres to stringent quality standards and provides regulatory documentation for global distribution.

Manufacturer / TM Owner

Medac Gesellschaft Für Klinische Spezialpräparate Mbh (Wedel)

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Indications & Clinical Uses

Methotrexate is used in several disease categories, primarily targeting immune‑mediated disorders and certain cancers.

  • Rheumatoid arthritis: reduces joint inflammation and slows disease progression.
  • Psoriasis: decreases skin cell proliferation and plaque formation.
  • Acute lymphoblastic leukemia: interferes with malignant cell DNA synthesis.
  • Other malignancies: employed as part of combination chemotherapy regimens to inhibit tumor growth.

How It Works

  • Methotrexate inhibits dihydrofolate reductase, leading to reduced tetrahydrofolate pools and impaired synthesis of purine and pyrimidine nucleotides. This blockade diminishes DNA, RNA and protein production, thereby limiting proliferation of rapidly dividing cells such as immune‑activated lymphocytes and malignant cells. The drug also exerts anti‑inflammatory effects by increasing extracellular adenosine levels, which modulates cytokine activity.

Side Effects

Methotrexate may cause a range of adverse reactions, which are grouped by frequency and severity.

Common Side Effects

  • Nausea: mild to moderate upset stomach.
  • Fatigue: generalized tiredness.
  • Mouth sores: ulceration of oral mucosa.

Serious or Rare Side Effects

  • Severe infection: heightened risk due to immunosuppression.
  • Liver toxicity: elevated enzymes or fibrosis.
  • Pulmonary fibrosis: progressive lung scarring.

Precautions & Warnings

Methotrexate requires careful monitoring and patient education before and during therapy.

  • Pregnancy: avoid use unless clearly indicated; teratogenic risk is high.
  • Renal function: assess baseline and monitor regularly to prevent accumulation.
  • Liver function: perform periodic liver enzyme tests and imaging as needed.
  • Blood counts: conduct routine complete blood counts to detect marrow suppression.
  • Store at 2-8°C: keep refrigerated, protect from light, do not freeze.

Avoid Interactions

Methotrexate interacts with several drug classes that may alter its safety or efficacy.

Major Interactions (Avoid)

  • NSAIDs: increase methotrexate toxicity by reducing renal clearance.
  • Trimethoprim‑sulfamethoxazole: potentiate bone‑marrow suppression.
  • Live vaccines: risk of severe infection due to immunosuppression.

Moderate Interactions (Monitor Closely)

  • Azathioprine: additive immunosuppressive effect, monitor blood counts.
  • Phenytoin: may lower methotrexate plasma levels, adjust dosing if needed.

Frequently Asked Questions

Metex contains methotrexate, which is prescribed for rheumatoid arthritis, moderate to severe plaque psoriasis, acute lymphoblastic leukemia and a variety of other malignancies where it is part of combination chemotherapy protocols.

Methotrexate blocks the enzyme dihydrofolate reductase, reducing the availability of tetrahydrofolate needed for DNA synthesis. This limits the proliferation of rapidly dividing cells such as immune‑activated lymphocytes and cancer cells, while also increasing extracellular adenosine to dampen inflammation.

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

Methotrexate is classified as teratogenic and is generally contraindicated during pregnancy. It can also be excreted in breast milk, so breastfeeding is not recommended while on therapy unless the prescriber determines the benefits outweigh the risks.

To request Metex, submit an enquiry on the product page at gnhindia.com with 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 where required) and necessary import documentation.

Compared with biologic agents, methotrexate is a small‑molecule antimetabolite that can be administered subcutaneously and is generally less costly. It offers broad immunosuppressive activity but may require more laboratory monitoring for hepatic, renal and hematologic safety.

Metex should be stored at 2‑8 °C in a refrigerator, protected from light and moisture. Do not freeze the product, and avoid shaking the vial. Keep it in the original packaging until ready for use.

Metex is supplied as a sterile solution for subcutaneous injection. The injection is typically given into the abdomen or thigh using a pre‑filled syringe or vial, following aseptic technique and the dosing schedule prescribed by the treating physician.

Serious risks include severe bone‑marrow suppression leading to infections, liver toxicity that can progress to fibrosis or cirrhosis, and pulmonary complications such as interstitial pneumonitis or fibrosis. Prompt reporting of symptoms like fever, persistent cough, jaundice or unusual bruising is essential.

Metex is contraindicated in patients with known hypersensitivity to methotrexate, severe renal or hepatic impairment, active uncontrolled infections, and in women who are pregnant or planning pregnancy unless the prescriber determines the benefit outweighs the risk.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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