Problem: The nurse is providing care for a client in the emergency room with an initial presence of pain in the abdomen. Assessment elicits the presence of rebound pain at McBurney's point, an ultrasound is positive for an inflamed appendix, and white blood cells (WBCs) are moderately elevated. The patient does not have an appendicolith and is concerned about the cost of surgery and the time away from work. Which prescription does the nurse anticipate from the health-care provider