Insulin glargine, a long-acting form of insulin, was marketed under the brand name LANTUS. Lantus is indicated for the treatment of adult and pediatric patients with type 1 diabetes mellitus or adult patients with type 2 diabetes mellitus who require basal (long-acting) insulin for the control of hyperglycemia. The primary activity of insulin glargine is regulation of glucose metabolism. It lowers blood glucose levels by stimulating peripheral glucose uptake, especially by skeletal muscle and fat, and by inhibiting hepatic glucose production. The off-label use of insulin glargine is the treatment type 2 diabetes in children and the treatment of gestational diabetes.