Safety and Efficacy of Anricfen for Postoperative Analgesia and Rehabilitation Promotion After Pancreaticoduodenectomy.Intervention Measures: For Normal Adults, Administer Ariceptin Injection Intravenously Post-operation at a Dose of 1 μg/Kgevery 8 Hours for Three Consecutive Days After Surgery.

Inclusion criteria

• Patients who underwent pancreatic surgery, including pancreaticoduodenectomy (PD), pancreatic-preserving pancreaticoduodenectomy (PPPD), and laparoscopic pancreaticoduodenectomy (LPD)
• Age ≥ 18 years old and < 80 years old
• ASA Ⅰ-Ⅲ
• Be able to clearly understand and voluntarily participate in the research

Exclusion criteria

• Merging severe primary diseases involving the heart, brain, liver, kidneys and hematopoietic system
• History of long-term use of psychotropic drugs and cognitive dysfunction
• Having a history of acute poisoning from alcohol, sleeping pills, painkillers or other drugs that affect the central nervous system
• Pregnancy or lactation period
• History of allergy to NSAIDs, opioids, or to the test medication
• Drug users, alcoholics, and opiate abusers
• Those who had a history of chronic pain before the operation and a history of long-term use of analgesics and/or sedatives
• Those who had thyroid dysfunction before the operation