Which type of insulin has an onset of 30-60 minutes and a peak action of 2-4 hours?

The correct answer is Regular insulin, which is known for having an onset of 30-60 minutes and a peak action of 2-4 hours. This profile makes it a short-acting insulin, suitable for controlling blood glucose levels during meals. Regular insulin is often used for its predictable nature, making it a common choice for managing blood sugar spikes after eating.

In contrast, Lispro is a rapid-acting insulin with a much quicker onset and peak action than Regular insulin, typically acting within 15 minutes and peaking around 1 hour. Glargine is a long-acting insulin with no significant peak, designed for basal insulin coverage over a 24-hour period. Detemir is also a long-acting insulin but tends to have a longer duration of action than Regular insulin and does not peak significantly like short-acting insulins do.

Understanding the different types of insulin and their onset and peak times is crucial for effective diabetes management, particularly when planning meals and managing blood sugar levels appropriately.