MSRA-1438

MSRA-1438

A 30-year-old female patient arrives at the Emergency Department with a two-day history of fever, headache, vomiting, and seizures. She has no significant medical history or allergies. Upon CT head examination, hypodensity of the left temporal lobe is identified, while a lumbar puncture reveals lymphocytes at 57 cells/µL (0-5 cells/µL), protein at 92 mg/100 mL (15-60 mg/100 mL), and glucose at 66 mg/100 mL (50-80 mg/100 mL). Serum blood glucose is normal. A brain MRI is subsequently performed, revealing prominent swelling and increased signal of the left temporal lobe and insular cortex. What is the urgent medication that must be initiated in this patient?