In a patient receiving regular and NPH insulin together, which statement accurately describes their peak actions?

In a patient receiving regular and NPH insulin together, which statement accurately describes their peak actions?

• A. Regular insulin peaks earlier (about 2-4 hours) while NPH peaks later (about 6-12 hours).
• B. NPH peaks earlier than regular insulin.
• C. Both peak at the same time.
• D. Regular insulin has no peak.

Answer: (A)

Regular insulin is a short-acting form that reaches its maximum effect about 2 to 4 hours after injection. NPH insulin is intermediate-acting and peaks later, typically around 6 to 12 hours after injection. When these two are given together, the regular insulin produces an earlier peak while the NPH insulin produces a later peak, so their peak actions are staggered rather than occurring at the same time. This is why the correct description is that regular peaks earlier and NPH peaks later. Regular insulin does have a peak, and NPH does have a peak too, just at a later time.

Regular insulin is a short-acting form that reaches its maximum effect about 2 to 4 hours after injection. NPH insulin is intermediate-acting and peaks later, typically around 6 to 12 hours after injection. When these two are given together, the regular insulin produces an earlier peak while the NPH insulin produces a later peak, so their peak actions are staggered rather than occurring at the same time. This is why the correct description is that regular peaks earlier and NPH peaks later. Regular insulin does have a peak, and NPH does have a peak too, just at a later time.