Metotab

Methotrexate, the active ingredient in Metotab, is an antimetabolite (folate antagonist) presented as an oral dosage form for systemic use. It is employed to treat certain cancers, autoimmune disorders, and severe skin conditions in adult patients. The drug works by interfering with DNA synthesis, which helps control abnormal cell growth and immune system activity. Metotab is marketed in the European Union and is available by prescription only, reflecting its potent pharmacological profile. It is supplied under strict Good Distribution Practice standards to ensure product integrity throughout the supply chain.

GNH USA supplies Metotab as a licensed, GDP-compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Methotrexate is used in several disease categories where rapid cell proliferation or immune activation is a key feature.

- Rheumatoid arthritis: reduces joint inflammation and slows disease progression. - Psoriasis: decreases skin cell turnover, improving plaque severity. - Acute lymphoblastic leukemia: inhibits malignant lymphoblast proliferation, supporting remission. - Non-Hodgkin lymphoma: impedes tumor growth, enhancing chemotherapy effectiveness. - Breast cancer: used as part of combination regimens to limit tumor cell replication. - Ectopic pregnancy: terminates trophoblastic tissue, preventing further implantation.

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

Common Side Effects: - Nausea or vomiting. - Fatigue and weakness. - Mouth sores (stomatitis). - Elevated liver enzymes. - Low white blood cell count (leukopenia). - Hair thinning or loss.

Serious or Rare Side Effects: - Severe liver injury or fibrosis. - Pulmonary toxicity (interstitial pneumonitis). - Bone marrow failure leading to pancytopenia.

When prescribing methotrexate, clinicians should observe several safety measures to minimize risks.

- Renal function: assess baseline creatinine and adjust dose in impairment. - Hepatic monitoring: perform regular liver function tests during therapy. - Hematologic surveillance: check complete blood count before each cycle. - Contraception: ensure effective contraception for both sexes due to teratogenicity. - Pregnancy and lactation: contraindicated in pregnancy (Category X) and not recommended while breastfeeding. - Store at ambient temperature: keep below 25°C in original container, protect from moisture and light.

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

Major Interactions (Avoid): - Non‑steroidal anti‑inflammatory drugs (NSAIDs): may increase methotrexate toxicity. - Proton pump inhibitors (e.g., omeprazole): can raise serum methotrexate levels. - Trimethoprim‑sulfamethoxazole: enhances risk of bone marrow suppression.

Moderate Interactions (Monitor Closely): - Penicillins (high‑dose): may reduce methotrexate clearance. - Live vaccines: risk of infection due to immunosuppression. - Alcohol: potentiates hepatic toxicity.