In Formulating the Teaching Plan for a Patient Who Is

In formulating the teaching plan for a patient who is taking metformin (Glucophage) , the nurse should include which of these priority instructions? Notify your healthcare provider if

A) you need a diagnostic test that uses iodinated contrast.
B) your urine becomes orange or red-tinted.
C) your urine becomes more concentrated.
D) you need an intermittent or indwelling urinary catheterization.