The full name of methotrexate is methotrexate tablets, and the dosage of methotrexate tablets 5 tablets per week depends on the patient’s condition. The instructions recommend 5-10 mg (2-4 tablets) per dose, once daily, once or twice weekly, 50-100 mg (20-40 tablets) per course of treatment for adults, and 15-20 mg/m2 (6-8 tablets) per dose, once weekly, for maintenance treatment of acute lymphoblastic leukemia. Patients should follow the doctor’s instructions to use the drug. Methotrexate tablets are mainly used for the treatment of all types of acute leukemia; head and neck cancer, lung cancer, soft tissue sarcoma, psoriasis; breast cancer, ovarian cancer, cervical cancer, malignant staphylococcus, chorionic epithelial carcinoma, testicular cancer. Adverse reactions include: gastrointestinal reactions, such as stomatitis, pharyngitis, nausea, abdominal pain, diarrhea, bleeding, etc.; hepatic function impairment, such as jaundice, alanine aminotransferase, etc. elevation, long-term oral administration can lead to hepatocellular necrosis, fatty liver, fibrosis, hepatic sclerosis; alopecia, reddening of the skin, itching, rash; low leukocytes can complicate infection. In addition, large doses can cause hematuria, proteinuria, oliguria, azotemia, uremia; long-term use of the drug can cause cough, shortness of breath, pneumonia, pulmonary fibrosis; long-term oral use of small doses can lead to bone marrow suppression, anemia and thrombocytopenia accompanied by bleeding of the skin or internal organs. Note: This drug is contraindicated in people who are highly allergic to this drug, and in people with extreme systemic failure, malignant fluid or concurrent infections, cardiopulmonary, hepatic and renal insufficiency. This drug is teratogenic and can be excreted in breast milk, so it is forbidden to be pregnant or breastfeeding while using this drug. The use of the drug in children and the elderly is not known. If you need to use methotrexate tablets, it is recommended to consult a professional doctor and follow the doctor’s instructions to regulate the use of medication.