The following medication orders are found in the patient's MAR: Metformin HCI 500 mg PO daily at 0900. Hydrochlorothiazide 25 mg PO every 12 hr at 0900 and 2100. Digoxin .25 mg PO daily at 0900. In reading the medication orders for the 0700-1500 shift, the nurse determines that the priority intervention is to: