How quickly does the therapeutic effect of lispro begin after subcutaneous injection?

The therapeutic effect of lispro, a rapid-acting insulin, begins to manifest approximately 15 minutes after subcutaneous injection. This quick onset allows for more flexible meal planning and helps to control postprandial blood glucose levels effectively. The speed of action is a critical characteristic of lispro, as it is designed to mimic the natural insulin secretion that occurs shortly after eating, facilitating better management of blood glucose for those with diabetes.

While some insulins may take longer to take effect, such as 30 to 60 minutes, lispro's rapid onset makes it especially useful for covering carbohydrate intake at mealtimes. This characteristic is essential for achieving optimal glucose regulation and minimizing the risk of post-meal hyperglycemia.