Methotrexate is known as methotrexate tablets, the side effects of taking 4 methotrexate tablets a week are mainly related to the patient’s physical condition, and patients with weak physical condition may have more side effects. In addition, different patients have different dosages, please follow the doctor’s instructions for medication. Side effects of regular doses of methotrexate tablets include gastrointestinal reactions, decreased appetite, liver function impairment, bone marrow suppression, low white blood cell complication of infections, hair loss and other symptoms; large quantities of the drug will cause hematuria, proteinuria, oliguria, azotemia, uremia, etc.; long-term use of the drug will cause coughing, shortness of breath, pneumonia, pulmonary fibrosis and so on. Methotrexate tablets are mainly used for the treatment of various 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. Note: It is forbidden for patients who are highly allergic to methotrexate tablets, pregnancy or breastfeeding is prohibited during the period of taking the drug, and there is no clinical basis for the use of this drug in children and the elderly. If you need to take methotrexate tablets, it is recommended to consult a professional doctor and follow the doctor’s instructions to standardize the treatment, not blindly self-medication.