What is the duration of action for Lispro insulin?

Lispro insulin is a rapid-acting insulin analog that is typically used for controlling blood glucose levels around mealtimes. Its peak action occurs quickly, generally within 30 to 90 minutes after administration, and the overall duration of action is usually around 3 to 6 hours.

While option C suggests that the duration is 9 hours, this aligns more accurately with the characteristics of longer-acting insulins than with the rapid-acting profile of Lispro. The rapid action of Lispro is designed to mimic the natural insulin response to food intake, leading to a shorter duration of action compared to other insulins that last longer. Therefore, stating a duration of 9 hours would not be accurate for Lispro, and the actual duration is better classified within the shorter timeframe typical for rapid-acting insulins.