Insulin Lispro is a rapid-acting insulin used to control blood sugar levels in people with diabetes. It works quickly, usually starting to lower blood sugar within 15 minutes after injection, making it effective for managing blood sugar spikes that occur after meals. This insulin is often taken just before or right after eating. It mimics the natural insulin response of the body, helping to regulate glucose levels effectively. Insulin Lispro is typically used in combination with longer-acting insulins to provide comprehensive blood sugar management throughout the day.