Ocitinib is known as ocitinib mesylate, and patients who experience adverse reactions while taking the drug should be treated symptomatically and the drug should be discontinued if necessary. The side effects of this drug are mainly diarrhea, rash, bone marrow suppression, dry skin, pruritus, liver and kidney function abnormalities, interstitial pneumonitis and so on. When diarrhea and other gastrointestinal symptoms, need to pay attention to diet, necessary to give antidiarrheal treatment; rash and other skin reactions, pay attention to skin moisturizing, antipruritic and other symptomatic treatment; bone marrow suppression, liver and kidney function abnormality, necessary to be to raise white blood cells, platelets, hemoglobin, liver, kidney protection and other treatment. If the adverse reactions are serious, the drug can be discontinued under the guidance of a doctor. Patients taking this drug, the emergence of adverse reactions to timely consultation, under the guidance of a professional doctor to avoid adverse consequences.