What type of insulin is characterized by a rapid onset of action and a short duration?

Rapid-acting insulin is characterized by its quick onset of action and short duration, making it a key option for managing blood glucose levels, particularly around mealtimes. This type of insulin typically begins working within 10 to 30 minutes after injection, peaking in about 1 to 3 hours, and lasting for approximately 3 to 5 hours. This rapid and brief action profile is ideally suited for helping patients control postprandial (after meal) glucose spikes.

In contrast, long-acting insulins have a slow onset and provide a steady level of insulin over an extended period, intermediate-acting insulins have a more moderate onset and duration, and short-acting insulins, while they act relatively quickly, do not match the rapid onset of rapid-acting insulins. This distinction is crucial for individuals managing their insulin therapy more effectively, particularly in relation to meals.