How does semaglutide work? Semaglutide works to lower high blood sugar by increasing the amount of insulin that is released, lowering the amount of glucagon released and by delaying gastric emptying. Semaglutide also controls appetite and so helps you reduce the amount of food that you want to eat.  Semaglutide is a glucagon-like peptide-1 (GLP-1) agonist Semaglutide Dosing information Dosing …