Nidanib is likely to affect appetite and loss of appetite is one of the main side effects of Nidanib. Nidanib is a tyrosine kinase inhibitor and the drug ingredient is nidanib acetate. It is mostly used in the treatment of idiopathic pulmonary fibrosis, and by blocking the signaling pathway of idiopathic pulmonary fibrosis, it can significantly improve the discomfort of patients. However, adverse reactions such as loss of appetite, nausea and vomiting, abdominal pain and diarrhea may occur with nidanib, and a few patients may also experience symptoms such as elevated liver enzymes, thrombocytopenia and metabolic disorders. In addition, it is generally not recommended for pregnant women, patients with hepatic insufficiency and those who are allergic to the ingredients of the drug. Therefore, it is recommended that patients use the drug correctly under the guidance of a professional doctor, and do not blindly use the drug on their own to avoid adverse consequences.