Lantus (insulin glargine) is a man-made form of a hormone that is produced in the body. Insulin is a hormone that works by lowering levels of glucose (sugar) in the blood. Insulin glargine is a long-acting insulin that starts to work several hours after injection and keeps working evenly for 24 hours.
Lantus is used to improve blood sugar control in adults and children with diabetes mellitus. Some brands of this medicine are for use only in adults. Carefully follow all instructions for the brand of insulin glargine you are using. Lantus is used to treat type 2 diabetes in adults. Lantus is also used to treat type 1 diabetes in adults and children who are at least 6 years old.