This study is testing if a medicine called amisulpride, given through a vein (intravenous), can help stop nausea (feeling sick) and vomiting after surgery in kids. It’s called a randomized, double-blind, Phase 2/3 trial, which means neither the doctors nor the patients know who gets the real medicine or a pretend one (placebo). The study is for kids from newborn to 17 years old who are having surgery under general anesthesia (medicine that makes you sleep during surgery). Kids will not be part of this study if they are having certain types of surgery, like brain surgery, or if they are using certain other medicines.

• Participants must be willing and able to join the study, with consent from parents.
• The study involves surgeries lasting at least 30 minutes and does not use propofol anesthesia.
• Females able to have children must use birth control during the study and for 48 hours after.