Semglee is a biosimilar to Lantus, containing insulin glargine—a long-acting insulin analog that helps maintain stable blood glucose levels over a 24-hour period. It is used to improve glycemic control in adults and children with type 1 diabetes and in adults with type 2 diabetes. By mimicking the body’s natural basal insulin release, Semglee helps reduce fasting blood sugar levels and supports overall diabetes management when used alongside diet and exercise.