A nurse administers subcutaneous NPH insulin at 0700 to a child who has diabetes. At which of the following times should the nurse observe for hypoglycemia caused by the onset of the medication?

Choice A reason: NPH insulin has an onset of 1-2 hours, peaking at 4-12 hours. At 0900, 2 hours post-administration, the effect is minimal, with low hypoglycemia risk. Peak action, when hypoglycemia is most likely due to maximum glucose-lowering effect, occurs later, making this time less critical for monitoring. Choice B reason: At 0730, only 30 minutes post-NPH insulin, the medication’s onset has not occurred, as it takes 1-2 hours to begin lowering glucose. Hypoglycemia is unlikely this early, as insulin levels are not yet significant. Peak effect at 4-12 hours is when monitoring is critical, making 0730 incorrect. Choice C reason: NPH insulin peaks at 4-12 hours, with significant glucose-lowering effects by 1100 (4 hours post-0700 injection). Hypoglycemia risk is highest during this period due to insulin’s maximum activity, reducing blood glucose. Monitoring at 1100 is critical to detect and treat low glucose, preventing symptoms like tremors or seizures. Choice D reason: At 0715, only 15 minutes post-NPH insulin, the medication has not reached its onset (1-2 hours). Hypoglycemia is unlikely, as insulin has not significantly lowered glucose. The peak effect at 4-12 hours is when hypoglycemia risk is highest, making 0715 an incorrect time for monitoring.