Metex

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 USA 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.

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.

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.

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.

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.