Methotrexate Aspire Pharma (Malta) (Methotrexate)

Methotrexate is used in several autoimmune and oncologic disease pathways to modulate cell proliferation and immune activity.

• Rheumatoid arthritis: reduces joint inflammation and slows disease progression.
• Psoriasis: decreases skin lesion severity and plaque formation.
• Acute lymphoblastic leukemia: impedes leukemic cell growth and improves remission rates.
• Non‑Hodgkin lymphoma: limits malignant lymphocyte proliferation.
• Gestational trophoblastic disease: promotes resolution of trophoblastic tissue.

• Methotrexate acts as a folate antagonist by inhibiting the enzyme dihydrofolate reductase. This inhibition lowers intracellular tetrahydrofolate levels, which are essential cofactors for the synthesis of purine nucleotides and thymidylate. Consequently, DNA, RNA and protein synthesis are disrupted, leading to reduced cellular replication, particularly in rapidly dividing immune cells and malignant cells. The drug also interferes with folate‑dependent enzymes involved in amino acid metabolism, further contributing to its antiproliferative effect.

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

Common Side Effects

• Nausea: mild to moderate upset stomach.
• Fatigue: general tiredness or weakness.
• Mouth sores: inflammation of oral mucosa.
• Elevated liver enzymes: mild hepatic irritation detectable in labs.

Serious or Rare Side Effects

• Bone marrow suppression: decreased blood cell production leading to anemia, infection risk.
• Pulmonary toxicity: interstitial pneumonitis presenting with cough and dyspnea.
• Severe hepatic injury: fibrosis or cirrhosis with prolonged use.

When using Methotrexate Aspire Pharma, careful monitoring and specific precautions are advised.

• Renal function monitoring: assess creatinine clearance before and during therapy.
• Hepatic monitoring: perform liver function tests regularly.
• Hematologic surveillance: complete blood count should be checked frequently.
• Avoid in pregnancy: drug is contraindicated due to teratogenic risk.
• Concomitant NSAIDs caution: may increase toxicity, monitor renal status.
• Store at ambient temperature: keep below 25°C in original packaging, protect from moisture.

Methotrexate can interact with several medicines, requiring attention to avoid harmful effects.

Major Interactions (Avoid)

• Live vaccines: may cause uncontrolled infection.
• High-dose aspirin: increases risk of bone marrow suppression.
• Certain antibiotics (e.g., trimethoprim‑sulfamethoxazole): can potentiate hematologic toxicity.

Moderate Interactions (Monitor Closely)

• Non‑steroidal anti‑inflammatory drugs (NSAIDs): may reduce renal clearance.
• Proton pump inhibitors: may affect absorption.
• Sulfonylureas: may enhance hypoglycemic effect.