The palliative care nurse is admitting a client who has metastatic bone cancer and is unable to eat or drink without immediate nausea and vomiting. The client is complaining of pain at 9 on a 0 to 10 pain scale, and the vital signs are: heart rate 99 beats/minute, respirations 38 breaths/minute, oxygen saturation 95%, and blood pressure 110/80 mm Hg. Which intervention should the nurse implement?