The new prescriptions are: "Abdominal CT with contrast in AM of 2/3" and "Increase quinapril to 40 mg PO daily." What is the nurse's rationale for holding metformin for the next four days on the client's MAR?

Metformin must be held for four days whenever the dose of quinapril is increased

The client may be leaving the facility to spend a few days with the son, but it is not yet confirmed.

The client wants a break from the drug as the blood glucose range is between 96 and 110 mg/dL

Metformin must be held 1-2 days before and two days after using intravenous contrast medium.