The client is in the operating room for abdominal surgery un…

The client is in the operating room for abdominal surgery under general anesthesia.  Suddenly, the nurse observes the following assessment cues on the client: apical pulse rate increases to 160 beats /minute temperature climbs to 101.8 F (38.7 C) skin mottling muscle rigidity The nurse suspects a complication to the anesthetic or muscle relaxant, and anticipates that which of the following IV medications will be given?