A nurse is reviewing a client's prescriptions. The nurse should contact the provider to clarify which of the following prescriptions? .. Phenytoin 100 mg PO every 8 hr Morphine 2.5 mg IV bolus PRN for incisional pain Regular insulin 7 units subcutaneous 30 min before breakfast and dinner Lisinopril 20 mg PO every 12 hr. Hold for systolic BP less than 110 mm Hg .