Semaglutide injection is a medication primarily used to treat type 2 diabetes by helping control blood sugar levels when used with diet and exercise. It acts as a glucagon-like peptide-1 (GLP-1) receptor agonist that stimulates insulin release and slows stomach emptying, which reduces appetite and food intake. Additionally, semaglutide is approved for weight loss management in adults with obesity or overweight with weight-related health conditions. It also helps reduce the risk of major cardiovascular events like heart attack and stroke in adults with type 2 diabetes and established heart disease. The injection is usually given once weekly under the skin.