Final answer:
The nurse should first assess the patient's blood glucose levels to determine if hypoglycemia is the cause of the confusion and anxiety.
Step-by-step explanation:
The nurse should first assess the patient's blood glucose levels to determine if hypoglycemia is the cause of the confusion and anxiety. Glyburide, a medication used to treat diabetes, can lower blood glucose levels, potentially leading to hypoglycemia. If the patient's blood glucose level is low, the nurse should administer a fast-acting source of carbohydrates, such as fruit juice or glucose tablets, to raise their blood sugar levels quickly.