A client admitted to the emergency department with an acute exacerbation of peptic ulcer disease is vomiting and describing epigastric pain and nausea. After obtaining vital sign measurements, which prescription should the nurse implement first?

C Place an indwelling urinary catheter and attach a bedside drainage unit. B Give a prescribed analgesic for temperature above 101°F (38.3° C). A Insert a nasogastric tube (NGT) and attach to low intermittent suction. D Send the client to x-ray for a flat plate of the abdomen.