Methotrexate Pfizer

Methotrexate, the active ingredient in Methotrexate Pfizer, is an antimetabolite presented as a parenteral formulation for intra‑arterial, intramuscular, and intrathecal use. It is employed to treat autoimmune disorders, certain malignancies, and gestational trophoblastic disease in adult patients.

GNH USA supplies Methotrexate Pfizer as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, oncology centres, and pharmacies worldwide. The company ensures quality compliance and reliable delivery across global markets.

Methotrexate is used in several autoimmune and oncologic disease pathways to modulate cell proliferation and immune activity. - Rheumatoid arthritis: reduces joint inflammation and slows disease progression. - Psoriasis: decreases skin lesion severity by limiting keratinocyte proliferation. - Acute lymphoblastic leukemia: eradicates malignant lymphoblasts through DNA synthesis inhibition. - Non‑Hodgkin lymphoma: induces tumor cell death in responsive lymphoma subtypes. - Gestational trophoblastic disease: promotes resolution of abnormal trophoblastic tissue.

Methotrexate may cause a range of adverse reactions, varying from mild to severe. Common Side Effects: - Nausea and vomiting - Oral mucosal ulceration - Fatigue - Transient elevation of liver enzymes Serious or Rare Side Effects: - Severe hepatotoxicity or fibrosis - Interstitial pneumonitis - Life‑threatening bone marrow suppression - Renal impairment due to drug precipitation

Methotrexate requires careful monitoring and specific safety measures. - Pregnancy: contraindicated (Category X); avoid use in pregnant or nursing women. - Baseline monitoring: obtain liver function tests, renal function, and complete blood count before initiation. - Folate supplementation: consider folic acid to reduce mucosal toxicity. - Concomitant nephrotoxic agents: avoid or monitor closely when used with NSAIDs or similar drugs. - Infection risk: monitor for signs of infection due to immunosuppression. - Store at 2-8°C: keep refrigerated, protect from light, do not freeze.

Methotrexate has several clinically important drug interactions that may require avoidance or close monitoring. Major Interactions (Avoid): - NSAIDs (e.g., ibuprofen, naproxen): increase methotrexate toxicity by reducing renal clearance. - Proton pump inhibitors (e.g., omeprazole): may elevate methotrexate levels. - Penicillins (e.g., ampicillin): impair renal excretion, raising serum concentrations. - Live vaccines: heightened risk of severe infection. Moderate Interactions (Monitor Closely): - Sulfonamides: may potentiate hematologic toxicity. - Azathioprine or other immunosuppressants: additive bone marrow suppression. - Vitamin B12 or folic acid antagonists: interfere with folate pathway. - Diuretics (e.g., furosemide): affect renal handling of methotrexate.