Yimerin side effects include diarrhea, hematologic damage, liver damage, and malignant vomiting. The main ingredient of this drug is irinotecan hydrochloride, which is a chemotherapy drug used for patients with advanced colorectal cancer, and can be used alone or in combination, the more common clinical side effect is delayed diarrhea, most patients have mild symptoms, without special treatment, only about 20% of patients will have severe diarrhea, and need to use antidiarrheal drugs for targeted treatment. Patients may also experience hematologic damage, with the majority of patients experiencing neutropenia. Some patients experience nausea and vomiting despite the use of antiemetic drugs. In addition, some patients are accompanied by rhinitis, increased drooling, tearing, sweating, flushing, bradycardia, etc. For high-risk patients, prophylactic treatment with atropine sulfate medication is required first to reduce the appearance of these side effects. The drug as an antitumor drug, there are different degrees of side effects, you need to use the drug under the guidance of a doctor.