Metex

Methotrexate, the active ingredient in Metex, is an antimetabolite presented as a solution for injection for subcutaneous use. It is employed to modulate immune activity and inhibit rapidly dividing cells in conditions such as rheumatoid arthritis, psoriasis, certain leukemias, lymphomas, and ectopic pregnancy. GNH USA supplies Metex as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, transplant centres, oncology centres, pharmacies and clinics worldwide.

Methotrexate acts on the immune system and cell proliferation pathways, making it useful across several disease families. - Rheumatoid arthritis: reduces joint inflammation and slows disease progression. - Psoriasis: diminishes skin plaque formation by limiting keratinocyte proliferation. - Acute lymphoblastic leukemia: interferes with malignant lymphoblast replication. - Non‑Hodgkin lymphoma: impedes growth of lymphoma cells. - Ectopic pregnancy: terminates trophoblastic tissue to avoid surgical intervention.

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

Common Side Effects: - Nausea or vomiting: mild gastrointestinal upset. - Fatigue: general tiredness or weakness. - Oral ulcers: painful sores in the mouth. - Elevated liver enzymes: mild hepatic irritation. - Low blood counts: mild anemia or leukopenia. - Skin rash: mild erythema or itching.

Serious or Rare Side Effects: - Severe liver toxicity: potential hepatitis or fibrosis. - Pulmonary fibrosis: progressive lung scarring. - Bone marrow suppression: severe pancytopenia. - Renal impairment: reduced kidney function. - Severe infection: opportunistic infections due to immunosuppression. - Teratogenicity: fetal malformations if exposure occurs during pregnancy.

Methotrexate requires careful monitoring and patient education before and during therapy. - Baseline testing: obtain liver function, renal function, and complete blood count before initiation. - Regular monitoring: repeat labs periodically to detect toxicity early. - Avoid alcohol: concurrent use can increase hepatic risk. - Contraception required: pregnancy is contraindicated due to teratogenic risk. - Drug holidays: temporary discontinuation may be advised for toxicity. - Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

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

Major Interactions (Avoid): - Non‑steroidal anti‑inflammatory drugs (NSAIDs): increase risk of renal toxicity. - Proton pump inhibitors: may raise methotrexate plasma levels. - Trimethoprim‑sulfamethoxazole: potentiates myelosuppression.

Moderate Interactions (Monitor Closely): - Penicillins: can reduce renal clearance of methotrexate. - Azathioprine or mycophenolate: additive immunosuppression. - Live vaccines: increased risk of infection, consider timing.