Imatinib Mesylate Tablet is an antineoplastic drug, and adverse effects of this drug include the possibility of weight gain after taking it. Imatinib mesylate is commonly used in the treatment of chronic myeloid leukemia of the Philadelphia chromosome. Adverse effects of this drug include symptoms such as weight gain, fluid retention, edema, fatigue, anemia, dermatitis, arthralgia, joint swelling, myalgias, headache, insomnia, abnormal sensations, nausea, vomiting, loss of appetite, itching, and night sweats (sweating that is abnormal after going to sleep, and stops when you wake up). For people who are allergic to this product should be prohibited from using this product, it is not recommended that lactating women and pregnant women use this product, if serious adverse reactions occur, it is recommended to immediately go to a regular hospital, the use of drugs is recommended to be carried out under the guidance of a professional doctor, do not judge the use of medication on your own to avoid the danger of occurring.