If a resident's blood glucose reading is 42, what should the certified medication aide do with the insulin order of 5 units?

When a resident's blood glucose reading is 42, this indicates hypoglycemia, which is a critical condition where blood sugar levels are dangerously low. In such cases, the immediate priority is to address the low blood glucose rather than administer insulin. Insulin lowers blood sugar levels further, which can lead to severe complications, including loss of consciousness or even seizures.

By opting to not give the insulin and notifying the supervisor, the medication aide demonstrates an understanding of safe medication administration practices and prioritizes the patient's safety. This approach allows for the potential administration of a rapid-acting carbohydrate to elevate the resident's blood sugar levels before any further actions related to insulin are considered. It reflects a responsible response to a medical emergency, ensuring that proper protocols are followed for treatment under the guidance of a healthcare professional.