Methotrexate Pfizer

Methotrexate, the active ingredient in Methotrexate Pfizer, is an antimetabolite presented as a oral tablet for oral use. It treats rheumatoid arthritis, psoriasis, acute lymphoblastic leukemia, non‑Hodgkin lymphoma, gestational trophoblastic disease and osteosarcoma in appropriate patients.

GNH USA supplies Methotrexate Pfizer as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, oncology centres, pharmacies and clinics worldwide.

Methotrexate is an antimetabolite used in several autoimmune and oncologic disease pathways.

- Rheumatoid arthritis: reduces joint inflammation and slows disease progression. - Psoriasis: diminishes skin plaque formation and severity. - Acute lymphoblastic leukemia: interferes with malignant cell proliferation. - Non‑Hodgkin lymphoma: impedes growth of lymphoma cells. - Gestational trophoblastic disease: promotes resolution of trophoblastic tissue. - Osteosarcoma: limits tumor cell replication.

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

Common Side Effects: - Nausea and vomiting. - Fatigue or weakness. - Oral mucosal ulceration. - Mild liver enzyme elevation. - Low white blood cell count. - Diarrhea.

Serious or Rare Side Effects: - Severe liver toxicity or fibrosis. - Pulmonary fibrosis or interstitial pneumonitis. - Life‑threatening infection due to bone‑marrow suppression. - Renal failure or nephrotoxicity. - Severe cutaneous adverse reactions (e.g., Stevens‑Johnson syndrome). - Hematologic malignancies or aplastic anemia.

Methotrexate requires careful monitoring and specific safety measures.

- Pregnancy contraindication: avoid use in pregnancy (Category X). - Liver monitoring: perform regular liver function tests. - Hematologic monitoring: check complete blood counts frequently. - Renal function: adjust dosing in renal impairment and monitor creatinine. - Alcohol avoidance: limit alcohol to reduce hepatic risk. - Store below 25°C: keep in the original pack, protect from moisture.

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

Major Interactions (Avoid): - NSAIDs: increase methotrexate toxicity. - Penicillins and sulfonamides: enhance myelosuppression. - Live vaccines: risk of severe infection. - Alcohol: potentiates hepatic injury.

Moderate Interactions (Monitor Closely): - Warfarin: may increase anticoagulant effect. - Proton pump inhibitors: can affect absorption. - Azathioprine or other immunosuppressants: additive immunosuppression. - Allopurinol: may raise methotrexate levels.