Admelog (insulin lispro injection) is a rapid-acting insulin used to improve blood sugar control in adults and children with diabetes mellitus. It works by helping glucose enter the body’s cells for energy, usually taken before meals to manage post-meal blood sugar spikes. Admelog can be used alone or with longer-acting insulin. Common side effects include low blood sugar (hypoglycemia), injection site reactions, and weight gain. Proper dosing, timing, and monitoring are essential for safe and effective use.