The correct name of Irinotecan is Irinotecan Niacin Injection, which is an antitumor drug. It is mainly used for the treatment of adults with metastatic colorectal cancer or those who have failed chemotherapy with 5-fluorouracil containing drugs. Irinotecan Hydrochloride is a derivative of comedones, which is mainly used to prevent cancer cells from dividing by specifically combining with topoisomerase I, avoiding the reconnection of the broken deoxyribonucleic acid single chain, thus achieving the effect of preventing cancer cells from dividing, thus playing an anti-tumor effect. At present, Irinotecan Hydrochloride is mainly used for chemotherapy of advanced colorectal cancer in clinic. Adverse reactions such as nausea and vomiting as well as diarrhea may occur with the use of the drug. It is contraindicated in patients with chronic enteritis and hypersensitivity to irinotecan hydrochloride trihydrate. Irinotecan hydrochloride belongs to prescription drugs, the drug should be used under the guidance of a professional doctor, and should not be used privately to avoid adverse consequences.