GNH USA

Europe — EMA

Metex

GNH USA supplies Metex (Methotrexate), a disease‑modifying antirheumatic drug for rheumatoid arthritis, psoriasis and certain cancers.

Methotrexate

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What is Methotrexate?

Methotrexate, the active ingredient in Metex, is an antimetabolite presented as a sterile subcutaneous injection for subcutaneous use. It is employed in the management of rheumatoid arthritis, psoriasis, acute lymphoblastic leukemia and other malignancies in both adult and pediatric patients as directed by a qualified prescriber.

GNH USA supplies Metex as a licensed, GDP‑compliant product to hospitals, pharmacies, oncology centres and clinics worldwide, adhering to EU quality standards and international regulatory requirements. The product is manufactured under strict GMP conditions and distributed through a secure cold‑chain logistics network.

What is Methotrexate used for?

Methotrexate is used in several disease categories where it modulates immune activity and cell proliferation.

Rheumatoid arthritis: reduces joint inflammation and slows structural damage. Psoriasis: decreases skin plaque formation and severity. Acute lymphoblastic leukemia: interferes with malignant cell replication as part of chemotherapy protocols. Other malignancies: provides antineoplastic activity in selected solid tumours and haematologic cancers.

What are the side effects of Methotrexate?

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

Common Side Effects: - Nausea and vomiting. - Oral mucosal ulceration (stomatitis). - Elevated liver enzymes.

Serious or Rare Side Effects: - Severe infection due to immunosuppression. - Pulmonary toxicity (interstitial pneumonitis). - Bone‑marrow aplasia leading to pancytopenia.

What precautions apply to Methotrexate?

Before initiating therapy, several safety considerations are required.

Pregnancy contraindication: avoid use in pregnancy (Category X). Liver monitoring: perform baseline and periodic liver‑function tests. Blood‑count monitoring: check complete blood count regularly. Live‑vaccine avoidance: do not administer live vaccines during treatment. Renal adjustment: modify dose in patients with impaired renal function. 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; some require avoidance while others need close monitoring.

Major Interactions (Avoid): - Non‑steroidal anti‑inflammatory drugs (increase toxicity). - Aminoglycoside antibiotics (enhance myelosuppression). - Live vaccines (risk of uncontrolled infection).

Moderate Interactions (Monitor Closely): - Warfarin (may alter INR). - Penicillins (increase risk of bone‑marrow suppression). - Sulfonamides (heighten myelosuppressive potential).

Frequently asked questions

What is Metex used for?+
Metex contains methotrexate and is indicated for the treatment of rheumatoid arthritis, moderate to severe plaque psoriasis, acute lymphoblastic leukaemia and selected other malignancies. In autoimmune conditions it helps control inflammation, while in cancer it acts as part of a chemotherapy regimen to inhibit tumour cell growth.
How does methotrexate work?+
Methotrexate blocks the enzyme dihydrofolate reductase, preventing the regeneration of tetrahydrofolate needed for purine and thymidylate synthesis. This limits DNA, RNA and protein production in rapidly dividing cells, producing immunosuppressive effects in autoimmune disease and antiproliferative effects against malignant cells.
What is the usual dose of Metex?+
The dose of Metex is individualized by the prescribing clinician based on the specific indication, patient weight, renal function and treatment response. Healthcare professionals determine the appropriate amount, frequency and titration schedule according to current clinical guidelines and patient monitoring results.
Is Metex safe in pregnancy or breastfeeding?+
Methotrexate is classified as Pregnancy Category X, meaning it is contraindicated during pregnancy because of a high risk of fetal malformations and miscarriage. It is also not recommended while breastfeeding, as it can be excreted in milk and may harm the infant.
How do I order Metex from GNH USA?+
To request Metex, 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 compare with the main alternative drug or class?+
The primary alternatives to methotrexate are biologic DMARDs such as adalimumab or etanercept. While biologics target specific cytokines, methotrexate offers a broad immunosuppressive effect, is less costly, and is often used as first‑line therapy. Some patients may require combination therapy if response to methotrexate alone is insufficient.
How should Metex be stored and handled?+
Metex must be stored in a refrigerator at 2‑8 °C. Keep the vial in its original packaging, protect it from light, and avoid freezing or shaking the solution. If temporary storage at room temperature is unavoidable, limit exposure to no more than 24 hours before use.
How is Metex administered?+
Metex is supplied as a sterile solution for subcutaneous injection. A healthcare professional administers the dose using a suitable needle, typically into the upper arm, thigh or abdomen. The injection site should be rotated to minimise local irritation, and aseptic technique must be observed throughout the procedure.
What are the most serious risks to watch for while using Metex?+
The most critical risks include severe infection due to immunosuppression, pulmonary toxicity such as interstitial pneumonitis, significant liver injury (fibrosis or cirrhosis), and bone‑marrow suppression leading to pancytopenia. Patients should report persistent fever, respiratory symptoms, jaundice or unusual bruising immediately.
Who should not use Metex?+
Metex is contraindicated in pregnant or breastfeeding individuals, patients with severe hepatic disease, uncontrolled renal impairment, active infections, or known hypersensitivity to methotrexate or any excipients. Caution is also advised for patients with a history of lung disease or those receiving other myelosuppressive agents.
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.
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Product details

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

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