Semaglutide injection ( ) is used along with an individualized low-calorie, low-fat diet and exercise program to help with weight loss in overweight adults who may also have high blood pressure, diabetes, or high cholesterol. Semaglutide injection is in a class of medications called incretin mimetics. It works by helping the pancreas to release the right amount of insulin when blood sugar levels are high. Insulin helps move sugar from the blood into other body tissues where it is used for energy. Semaglutide injection also works by slowing the movement of food through the stomach and may decrease appetite and cause weight loss.