The effects of Palonosetron Hydrochloride Injection are as follows: i. Palonosetron Hydrochloride Injection has the effect of antiemetic, so it can be used to treat the digestive symptoms experienced by patients. Palonosetron Hydrochloride Injection mainly acts on 5-HT receptors, which are distributed in the vomiting center of the medulla oblongata. Chemotherapy drugs also act on the medulla oblongata, so Palonosetron Hydrochloride Injection can prevent central nausea and vomiting symptoms caused by chemotherapy drug stimulation. This medication can be used to prevent chemotherapy-induced gastrointestinal symptoms prior to the use of chemotherapy drugs. Palonosetron Hydrochloride Injection is a gastrointestinal disorder medication, and the main adverse reaction manifests itself as an allergic reaction. If adverse reactions occur during the use of the drug, you need to stop the drug in time. The usual dosage of palonosetron hydrochloride injection is 0.25 mg, and the injection time should be controlled for more than half a minute.