Sishujing? (Anrikefon Injection) is the world's first highly selective peripheral kappa opioid receptor agonist approved for analgesic indications. It was approved for marketing in May 2025 for the treatment of mild to moderate pain following abdominal surgery and for adult patients with moderate to severe pruritus associated with chronic kidney disease on maintenance hemodialysis.
[1] Package Insert of Anrikefon Injection.
[2] Guideline for Perioperative Pain Management in Patients Undergoing Abdominal Surgery (2025 Edition).
[3] A multicenter, randomized, double-blind, placebo-controlled Phase III clinical study to evaluate the efficacy and safety of Anrikefon Injection for postoperative analgesia in subjects undergoing elective abdominal laparoscopic surgery under general anesthesia (Study No.: NCT04738357)
[4] A multicenter, randomized, double-blind, placebo/active-controlled Phase III clinical study to evaluate the efficacy and safety of Anrikefon Injection for the treatment of postoperative pain (Study No.: NCT05390905)