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A nurse is caring for an elderly client who is taking metformin (Glucophage) for diabetes and is scheduled for cardiac catheterization. Which of the following is important for the physician to order?A. Withhold the metformin prior to cardiac catheterizationB. Administer the medication with a sip of water prior to the testC. Give the medication before breakfastD. Limit the amount of protein in the diet prior to the test
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