Insulin is a hormone that works by lowering levels of glucose (sugar) in the blood. Regular insulin is a short-acting insulin that starts to work within 30 minutes after injection, peaks in 2 to 3 hours, and keeps working for up to 8 hours.
Regular insulin is used to improve blood sugar control in adults and children with diabetes mellitus.  insulin regular may be used for type 1 or type 2 diabetes.
Regular insulin may also be used for purposes not listed in this medication guide.
