GNH USA

Europe — EMA

Metoject Pen

GNH USA supplies Metoject Pen (Methotrexate), a antimetabolite for rheumatoid arthritis, psoriasis and certain cancers. Request a quote for global supply.

Methotrexate

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What is Methotrexate?

Methotrexate, the active ingredient in Metoject Pen, is an antimetabolite presented as a subcutaneous injection pen for subcutaneous use. It interferes with DNA synthesis and is employed in the management of autoimmune disorders and certain malignancies in adult and pediatric patients. It is indicated for conditions such as rheumatoid arthritis, severe plaque psoriasis, and selected oncologic protocols, and is administered under medical supervision.

GNH USA supplies Metoject Pen as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, oncology centres and pharmacies worldwide, ensuring quality, regulatory compliance and reliable logistics for global healthcare providers.

What is Methotrexate used for?

Methotrexate is used in several disease categories where inhibition of cell proliferation is therapeutic. - Rheumatoid arthritis: reduces joint inflammation and slows disease progression. - Severe plaque psoriasis: decreases skin cell turnover and improves lesion appearance. - Certain cancers (e.g., acute lymphoblastic leukemia, osteosarcoma): impedes tumor cell growth as part of chemotherapy regimens.

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 - Fatigue or weakness - Mouth sores (stomatitis) - Mild elevation of liver enzymes - Decreased white blood cell count - Headache

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

What precautions apply to Methotrexate?

When prescribing methotrexate, clinicians should consider several precautionary measures to minimise risk. - Renal function: assess baseline creatinine and adjust dose in impairment. - Hepatic health: monitor liver enzymes regularly and avoid use in pre‑existing severe liver disease. - Hematologic status: perform complete blood counts before initiation and periodically during therapy. - Pregnancy and contraception: avoid use in pregnancy; ensure effective contraception for women of child‑bearing potential. - Drug interactions: review concomitant medications that may increase toxicity. - 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 can alter its efficacy or toxicity.

Major Interactions (Avoid): - Non‑steroidal anti‑inflammatory drugs (NSAIDs): increase methotrexate plasma levels and risk of toxicity. - Penicillins and other β‑lactam antibiotics: may reduce renal clearance and heighten toxicity. - Sulfonamides and trimethoprim: potentiate bone marrow suppression. - Live vaccines: heightened risk of severe infection due to immunosuppression. - Proton pump inhibitors (high dose): may increase methotrexate exposure.

Moderate Interactions (Monitor Closely): - Azathioprine or leflunomide: additive immunosuppressive effect. - Warfarin: enhanced anticoagulant effect, monitor INR. - Oral contraceptives: may reduce methotrexate clearance. - Allopurinol: possible increase in methotrexate toxicity. - Vitamin supplements containing folic acid: may diminish therapeutic effect, adjust dosing.

Frequently asked questions

What is Metoject Pen used for?+
Metoject Pen contains methotrexate, an antimetabolite used to treat autoimmune conditions such as rheumatoid arthritis and severe plaque psoriasis, as well as to support chemotherapy regimens for certain cancers like acute lymphoblastic leukemia and osteosarcoma. The medication works by limiting the rapid division of immune cells and malignant cells, helping to control disease activity and tumor growth.
How does methotrexate work?+
Methotrexate blocks the enzyme dihydrofolate reductase, which is required to regenerate tetrahydrofolate, a form of folate essential for synthesising purine nucleotides and thymidylate. By inhibiting this pathway, the drug reduces DNA, RNA and protein production, leading to decreased proliferation of rapidly dividing cells such as activated lymphocytes and cancer cells, thereby exerting immunosuppressive and cytotoxic effects.
What determines the dose of Metoject Pen?+
The dose of Metoject Pen is individualized by the prescribing healthcare professional based on the specific indication, patient weight, renal and hepatic function, and response to therapy. Physicians calculate the appropriate amount and frequency, and patients should follow the exact regimen provided on the prescription label without making any changes on their own.
Is Metoject Pen safe during pregnancy or breastfeeding?+
Methotrexate is generally contraindicated during pregnancy because it can cause fetal malformations and miscarriage. Women of child‑bearing potential should use effective contraception while receiving the drug and for a period after discontinuation as advised by their clinician. Limited data exist for breastfeeding, and the medication is usually avoided; a healthcare provider should assess risks versus benefits.
How do I order Metoject Pen from GNH USA?+
To request Metoject Pen, visit the product page on gnh-usa.com, enter the desired quantity, and submit the enquiry form. GNH USA works with hospitals, pharmacies and procurement teams worldwide, verifying trade or institutional credentials before providing a quotation, confirming availability, arranging appropriate shipping (including cold‑chain if required), and handling all necessary import documentation.
How does Metoject Pen compare with other methotrexate formulations or alternative drugs?+
Metoject Pen delivers methotrexate via a pre‑filled subcutaneous pen, offering convenient self‑administration and more consistent absorption compared with oral tablets, which can have variable bioavailability. Compared with other injectable forms, the pen design reduces preparation steps and needle handling. Alternative disease‑modifying agents, such as biologic therapies, target specific cytokines, whereas methotrexate provides a broad immunosuppressive effect at a lower cost.
What are the recommended storage conditions for Metoject Pen?+
Metoject Pen should be stored at 2‑8 °C (refrigerated). Keep the pen in its original packaging, protect it from light, and avoid freezing or shaking the device. If the product must be transported, maintain the cold‑chain using insulated containers and temperature‑monitoring packs to preserve stability.
How is Metoject Pen administered?+
Metoject Pen is a pre‑filled, single‑use pen designed for subcutaneous injection. After confirming the prescribed dose, the user removes the protective cap, selects the injection site (typically the abdomen or thigh), and presses the activation button to deliver the medication. The pen automatically administers the set volume, and the needle is then safely disposed of in an approved sharps container.
What are the most serious risks to watch for while using Metoject Pen?+
Serious adverse events include severe liver toxicity, bone‑marrow suppression leading to pancytopenia, pulmonary fibrosis or interstitial pneumonitis, acute kidney injury, and life‑threatening infections. Patients should be educated to report persistent abdominal pain, unexplained bruising or bleeding, shortness of breath, yellowing of the skin or eyes, and any signs of severe infection promptly to their healthcare provider.
Who should not use Metoject Pen?+
Metoject Pen is contraindicated in individuals with known hypersensitivity to methotrexate or any excipients, those with severe hepatic impairment, uncontrolled infections, and pregnant women. Caution is also advised for patients with significant renal dysfunction, existing bone‑marrow suppression, or active pulmonary disease. A qualified clinician must evaluate each patient’s medical history before initiating therapy.
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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