Review Question - QID 210614

A 33-year-old man presents to the emergency department with sudden onset right hand and right leg weakness. The patient was at home cleaning when his symptoms began. He also complains of diffuse and severe pain throughout his entire body which he states he has experienced before. The patient is an immigrant from South America, and his medical history is not known. His temperature is 98.9°F (37.2°C), blood pressure is 128/67 mmHg, pulse is 80/min, respirations are 16/min, and oxygen saturation is 99% on room air. CT of the head demonstrates no bleeding. Physical exam is notable for 2/5 strength in the patient's right arm and right leg. Which of the following is the most appropriate management for this patient?