Using NEPA to prevent nausea and vomiting after gastrointestinal cancer surgery

Inclusion Criteria:

* 1\. Male or female, aged 18-65 years old; 2. The subjects were diagnosed with liver, gallbladder, and pancreatic diseases through histology or cytology and underwent elective surgical treatment, including but not limited to pancreaticoduodenectomy, liver resection, bile duct stone removal, etc., and received treatment with Netopitam Palonosetron capsules; 3. The subject is not in lactation period; 4. When screening female patients with potential pregnancy, it is necessary to confirm that the pregnancy test must be negative; 5. The subjects voluntarily and strictly comply with the research protocol requirements and sign a written informed consent form.

Exclusion Criteria:

* 1\) Serious liver and kidney dysfunction, cardiopulmonary dysfunction, or other serious diseases have not received standardized treatment; 2) Having a serious mental illness in the past; 3) Take antiemetics or antidepressants within 48 hours before surgery; 4) Patients receiving systemic glucocorticoid treatment within 4 weeks prior to surgery; 5) Take NK1 receptor antagonists or any investigational drugs within 4 weeks prior to the start of the experiment; 6) Use CYP3A4 inducer within 4 weeks prior to surgery, and CYP3A4 substrate or potent, moderate CYP3A4 inhibitor within 1 week; 7) Pregnant or lactating women, patients with fertility who are unwilling or unable to take effective contraceptive measures; 8) Drug and/or alcohol abuse; 9) Hypocalcemia or any other condition that may cause vomiting; 10) The subject has an allergic reaction to Netopitam Palonosetron capsules or any of their excipients; 11) Participate in another clinical study within 30 days prior to baseline visit, using any exploratory drugs or devices; Allow participation in observational research; 12) Researchers assess other situations that may affect the progress of clinical research and the determination of research results.