Ask the Professionals

Return to Questions

Can you inject insulin after the meal?

  • Anonymous ORIGINAL POSTER
    What happens when you inject insulin after the meal? maybe 1 hour after the meal
  • Samuel Grossman, BS Pharm, Pharm.D, CDE PROFESSIONAL
    When you inject insulin after meals, the maximum concentration of the insulin injected will be achieved after the food was absorbed from the stomach. When the maximum concentration of insulin is achieved after the food is absorbed, you are at risk for low blood glucose levels called " Hypoglycemia". Meal time insulin is to be administered within 15 minutes of the meal to prevent risk of hypoglycemia. If you forgot to inject insulin before the meal and remember 1-2 hours later, evaluate when you are about to eat next. If you are about to eat within the hour or so wait to inject until the next meal