Which of the following medications is classified as a rapid-acting insulin?

Humalog, also known as insulin lispro, is classified as a rapid-acting insulin. This type of insulin is designed to be absorbed quickly into the bloodstream, making it effective for controlling postprandial blood glucose levels. Rapid-acting insulins typically start working within 15 minutes after injection, peak in about 1 to 2 hours, and can last for a few hours, providing flexibility for patients who need to manage their blood sugar around mealtimes.

In contrast, Lantus (insulin glargine) and Levemir (insulin detemir) are both long-acting insulins that provide a steady level of insulin over a 24-hour period, which is useful for maintaining baseline insulin levels throughout the day and night. Choosing a rapid-acting insulin like Humalog allows for better control of immediate blood sugar spikes that occur after eating, making it crucial for mealtime use. The differences in action and duration between rapid-acting and long-acting insulins highlight the specific use and planning involved in insulin therapy for diabetes management.