Product image of Metotrexato Semanal Wyeth (Methotrexate) supplied by GNH India

Metotrexato Semanal Wyeth

Active Ingredient:
Methotrexate
Origin:
EU

Metotrexato Semanal Wyeth (Methotrexate)

Methotrexate, the active ingredient in Metotrexato Semanal Wyeth, is an antimetabolite presented as an oral formulation for oral use. It is employed as an immunosuppressant to manage inflammatory and autoimmune conditions such as rheumatoid arthritis, psoriasis and juvenile idiopathic arthritis.

GNH India supplies Metotrexato Semanal Wyeth as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Wyeth Farma S.A

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Indications & Clinical Uses

Methotrexate acts as an antimetabolite that modulates immune activity in several chronic inflammatory diseases.

  • Rheumatoid arthritis: reduces joint inflammation and slows disease progression.
  • Psoriasis: decreases skin plaque formation and severity.
  • Juvenile idiopathic arthritis: controls systemic inflammation and improves joint function.

How It Works

  • Methotrexate inhibits the enzyme dihydrofolate reductase, leading to reduced tetrahydrofolate levels and impaired DNA synthesis in rapidly dividing cells. This action suppresses immune cell proliferation and cytokine production, resulting in immunosuppression and anti‑inflammatory effects that are useful in autoimmune disorders.

Side Effects

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

Common Side Effects

  • Nausea or vomiting: mild to moderate gastrointestinal upset.
  • Fatigue: persistent tiredness unrelated to activity level.
  • Oral ulceration: sores or inflammation in the mouth.
  • Elevated liver enzymes: mild hepatic irritation detectable on labs.
  • Hair thinning: temporary reduction in hair density.
  • Skin rash: mild erythematous eruptions.

Serious or Rare Side Effects

  • Severe liver toxicity: potential for hepatitis or fibrosis.
  • Bone marrow suppression: leading to anemia, leukopenia or thrombocytopenia.
  • Pulmonary toxicity: interstitial pneumonitis or fibrosis.
  • Severe infection: opportunistic infections due to immunosuppression.
  • Renal impairment: decreased clearance causing toxicity.
  • Rare hypersensitivity reactions: including Stevens‑Johnson syndrome.

Precautions & Warnings

Methotrexate requires careful monitoring and specific safety measures.

  • Liver monitoring: perform baseline and periodic liver function tests.
  • Hematologic monitoring: check complete blood counts regularly.
  • Renal function: assess creatinine clearance before and during therapy.
  • Pregnancy contraindication: avoid use in pregnancy due to teratogenicity (Category X).
  • Contraception: both males and females should use effective contraception during treatment.
  • Store below 25°C: keep in the original packaging, protect from moisture and direct sunlight.

Avoid Interactions

Methotrexate interacts with several drug classes that may alter its efficacy or toxicity.

Major Interactions (Avoid)

  • Non‑steroidal anti‑inflammatory drugs (NSAIDs): increase methotrexate plasma levels and risk of toxicity.
  • Proton pump inhibitors: may reduce renal clearance, raising systemic exposure.
  • Sulfonamide antibiotics: potentiate bone marrow suppression.

Moderate Interactions (Monitor Closely)

  • Trimethoprim‑sulfamethoxazole: may enhance hematologic toxicity.
  • Oral contraceptives: may reduce methotrexate effectiveness.
  • Live vaccines: increased risk of infection; avoid concurrent administration.

Frequently Asked Questions

Metotrexato Semanal Wyeth contains methotrexate and is prescribed for chronic inflammatory disorders such as rheumatoid arthritis, plaque psoriasis and juvenile idiopathic arthritis. In each condition the drug helps to reduce immune‑mediated inflammation, limit tissue damage and improve clinical symptoms.

Methotrexate blocks the enzyme dihydrofolate reductase, which is essential for synthesizing tetrahydrofolate, a co‑factor for DNA production. By limiting DNA synthesis, it suppresses the proliferation of immune cells and decreases cytokine release, providing anti‑inflammatory and immunosuppressive effects that are useful in autoimmune diseases.

The exact dose of Metotrexato Semanal Wyeth is determined by the prescribing clinician based on the patient’s condition, weight, renal function and response to therapy. Healthcare professionals tailor the weekly dosage to achieve optimal therapeutic benefit while minimizing potential toxicity.

Methotrexate is classified as Pregnancy Category X, meaning it is contraindicated in pregnancy because it can cause fetal malformations and miscarriage. It is also not recommended while breastfeeding, as it may be excreted in breast milk and affect the infant. Effective contraception is required for both men and women during treatment.

To place an order, submit an enquiry on the product page at gnhindia.com, specifying the required quantity. GNH India works with hospitals, pharmacies and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details (including any cold‑chain requirements) and necessary import documentation.

Methotrexate is an antimetabolite that offers oral weekly dosing, which can be more convenient than biologic agents that require subcutaneous or intravenous administration. While biologics target specific cytokines, methotrexate provides broad immunosuppression and is often used as first‑line therapy or in combination with other agents for synergistic effect.

Store Metotrexato Semanal Wyeth below 25 °C in its original container, protecting it from moisture, heat and direct sunlight. Do not refrigerate or freeze the product, and keep it out of reach of children.

Metotrexato Semanal Wyeth is taken orally, typically as a single weekly dose. Patients should follow the prescribing clinician’s instructions regarding timing (e.g., with or without food) and any required folic acid supplementation to reduce gastrointestinal side effects.

The most serious risks include severe liver toxicity, bone marrow suppression leading to anemia or infection, and pulmonary toxicity such as interstitial pneumonitis. Early detection through regular laboratory monitoring and prompt reporting of symptoms like persistent cough, jaundice or unusual bruising are essential for safety.

Methotrexate should not be used by individuals who are pregnant, planning pregnancy, or breastfeeding. It is also contraindicated in patients with severe liver disease, significant renal impairment, uncontrolled infections, or known hypersensitivity to methotrexate or any of its excipients.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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