A 10-month-old boy presents to the ED with 1-day history of fever to 104°F (40°C), increased irritability decreased breastfeeding refusal of solid foods The parents brought him in after two 30-second episodes of generalized jerking that occurred over a 20-minute span. Examination Examination reveals boy as an awake but lethargic infant. The anterior fontanelle is flat, the tympanic membranes and oropharynx are moist and not erythematous, the lungs are clear, and the heart and abdominal examinations are normal.
He has no focal neurologic findings. Which of the following is the best next step in the management?
