A patient with Type II Diabetes on oral hypoglycemic therapy is scheduled for angiography using IV contrast dye. What teaching should the nurse include?

Choice A reason: Metformin should be withheld for 48 hours after contrast administration due to the risk of lactic acidosis, especially in patients with impaired renal function. This is a well-established safety protocol. Choice B reason: Repaglinide is a short-acting insulin secretagogue that should be taken with meals to avoid hypoglycemia. Skipping breakfast and taking repaglinide could lead to hypoglycemia, not a recommended practice. Choice C reason: Glipizide does not protect the kidneys from contrast-induced nephropathy. In fact, sulfonylureas can increase the risk of hypoglycemia and should be used cautiously around procedures. Choice D reason: While avoiding hyperglycemia is important, taking medications without considering the procedure and contrast risks could be harmful. Metformin, in particular, must be withheld temporarily.