GNH USA

Europe — EMA

Metex Pen

GNH USA supplies Metex Pen (Methotrexate), an antimetabolite immunosuppressant for rheumatoid arthritis, psoriasis and cancers. Request a quote for supply.

Methotrexate

Request sourcing

1
Pack/s

What is Methotrexate?

Methotrexate, the active ingredient in Metex Pen, is an antimetabolite presented as a pre‑filled pen for subcutaneous injection use. It treats rheumatoid arthritis, psoriasis, certain cancers and ectopic pregnancy in appropriate patients.

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

What is Methotrexate used for?

Methotrexate is used in autoimmune and oncologic conditions that involve rapid cell proliferation.

Rheumatoid arthritis: reduces joint inflammation and slows disease progression. Psoriasis: decreases skin lesion severity and plaque formation. Acute lymphoblastic leukemia: inhibits malignant lymphoblast proliferation. Non‑Hodgkin lymphoma: suppresses tumor growth. Ectopic pregnancy: terminates trophoblastic tissue.

What are the side effects of Methotrexate?

Methotrexate may cause a range of adverse reactions.

Common Side Effects: - Nausea or vomiting. - Fatigue or malaise. - Headache. - Mild elevation of liver enzymes. - Stomatitis or mouth ulcers. - Increased susceptibility to mild infections.

Serious or Rare Side Effects: - Severe liver toxicity or hepatitis. - Bone marrow suppression leading to pancytopenia. - Pulmonary fibrosis or interstitial pneumonitis. - Life‑threatening infections. - Acute renal failure. - Anaphylactic or severe hypersensitivity reactions.

What precautions apply to Methotrexate?

Patients receiving Methotrexate should be monitored closely for safety.

Monitor liver function: perform regular hepatic enzyme tests. Monitor blood counts: watch for cytopenias and anemia. Avoid use in pregnancy: drug is teratogenic (Category X). Use caution in renal impairment: adjust dose as needed. Counsel on infection risk: advise prompt reporting of fever or signs of infection. Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

What does Methotrexate interact with?

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

Major Interactions (Avoid): - NSAIDs: increase methotrexate toxicity. - Live vaccines: heightened risk of infection. - Trimethoprim‑sulfamethoxazole: enhanced bone‑marrow suppression. - Alcohol: additive liver damage.

Moderate Interactions (Monitor Closely): - Proton pump inhibitors: may affect absorption. - ACE inhibitors: possible renal effects. - Anticonvulsants (e.g., phenytoin): may alter methotrexate levels.

Frequently asked questions

What conditions is Metex Pen used to treat?+
Metex Pen contains methotrexate, which is prescribed for rheumatoid arthritis, moderate to severe plaque psoriasis, certain hematologic cancers such as acute lymphoblastic leukemia and non‑Hodgkin lymphoma, and for medical management of ectopic pregnancy. The specific indication depends on the patient’s diagnosis and the prescribing clinician’s assessment.
How does methotrexate work in the body?+
Methotrexate blocks the enzyme dihydrofolate reductase, preventing the formation of tetrahydrofolate needed for purine and pyrimidine synthesis. This hampers DNA, RNA and protein production, reducing the proliferation of rapidly dividing cells, including immune cells and malignant cells, thereby providing immunosuppressive and anticancer effects.
What is the usual dose of Metex Pen?+
The dose of Metex Pen is individualized by the treating physician based on the patient’s condition, weight, renal function and response to therapy. The prescriber determines the exact amount, frequency and duration of treatment, and patients should follow the written prescription without alteration.
Is Metex Pen safe to use during pregnancy or while breastfeeding?+
Methotrexate is classified as Pregnancy Category X because it is known to cause fetal harm and is contraindicated in pregnancy. It is also excreted in breast milk and may affect the infant. Women of child‑bearing potential must use effective contraception, and breastfeeding is not recommended while on therapy.
How do I order Metex Pen from GNH USA?+
To request Metex Pen, submit an enquiry on the product page at gnh-usa.com, specifying the required quantity. GNH USA works with hospitals, pharmacies and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details (including cold‑chain if needed) and any required import documentation.
How does Metex Pen compare with other immunosuppressants?+
Methotrexate, the active ingredient in Metex Pen, is an antimetabolite that directly interferes with folate metabolism, whereas many other immunosuppressants (e.g., biologic agents) target specific cytokines or cell surface receptors. Methotrexate is often less expensive, can be administered subcutaneously, and has a well‑established efficacy profile for rheumatoid arthritis and psoriasis, but its safety monitoring requirements differ.
What are the storage requirements for Metex Pen?+
Metex Pen should be stored in a refrigerator at 2‑8 °C (36‑46 °F). Keep the pen in its original packaging, protect it from light, and avoid freezing or shaking. If a short period at room temperature is unavoidable, follow the manufacturer’s guidance on maximum exposure time.
How is Metex Pen administered?+
Metex Pen is a pre‑filled, single‑use pen designed for subcutaneous injection. The patient or healthcare professional selects the prescribed dose, removes the needle guard, and injects the medication into the subcutaneous tissue of the thigh, abdomen or upper arm, rotating sites with each injection to reduce local irritation.
What are the most serious risks associated with Metex Pen?+
The most serious risks include severe liver toxicity, bone‑marrow suppression leading to pancytopenia, pulmonary fibrosis or interstitial pneumonitis, acute renal failure, and life‑threatening infections. Patients should be monitored regularly for liver enzymes, blood counts and renal function, and any signs of respiratory distress or infection require immediate medical attention.
Who should not use Metex Pen?+
Metex Pen is contraindicated in pregnant or breastfeeding women, patients with known hypersensitivity to methotrexate, those with severe hepatic or renal impairment, and individuals with active, uncontrolled infections. It should also be avoided in patients receiving live vaccines or in combination with other drugs that markedly increase methotrexate toxicity without close supervision.
Information provided on this page is for educational use by procurement and clinical professionals. Always consult a licensed healthcare provider for medical advice and prescribing decisions. GNH USA supplies this product subject to applicable regulatory and licensing requirements.

Product details

Drug
Methotrexate
Route
Subcutaneous Use
Manufacturer
Medac Gesellschaft Für Klinische Spezialpräparate Mbh (Wedel)
Origin
EU

Related products