Which of the following insulins is considered rapid-acting?

Humalog, known generically as insuling lispro, is classified as a rapid-acting insulin. This insulin works quickly to lower blood sugar levels, typically starting to take effect within 15 minutes after injection and peaking around 1 to 2 hours. It is particularly useful in managing blood glucose levels in relation to meals, as it mimics the body’s natural insulin response to food intake.

In contrast, the other options are not considered rapid-acting. NPH is an intermediate-acting insulin, Regular insulin is short-acting, and Lantus is a long-acting insulin. Each of these types has distinct characteristics in terms of onset, peak, and duration, making rapid-acting insulin like Humalog an essential option for immediate blood sugar control.