a client 4-hours postoperative is requesting morphine for the third time for pain rated an 8 on the numeric pain scale. the vital signs include temperature of 97.5 f, heart rate of 88 beats/min, respiratory rate of 12 breaths/min, blood pressure 104/60 mm hg, and oxygen saturation 98% on room air. assuming that a dose of the drug is due, which action would be best for the nurse to take?