Review Question - QID 210854

A 32-year-old man presents to the emergency department for evaluation of headache. His symptoms started last night and have persisted. He occasionally has migraine headaches, but he has not had a headache like this in the past. He reports associated nausea, vomiting, fevers, and neck pain. He has a medical history of asthma. His temperature is 100.4°F (38.0°C), blood pressure is 110/60 mmHg, pulse is 95/min, respirations are 17/min, and oxygen saturation is 98% on room air. On physical exam, he appears uncomfortable. Neurologic exam reveals no focal deficits. There is pain with passive neck flexion. No edema or rashes are noted. Lungs are clear to auscultation bilaterally. Lumbar puncture is performed and CSF results are obtained as shown below.

Cerebrospinal fluid (CSF):
Cell count: 175/mm^3
RBCs: 0/mm^3
Cl-: 119 mEq/L
Glucose: 49 mg/dL
Pressure: 150 mmH2O
Total protein: 55 mg/dL

Based on these results, which of the following is the most appropriate treatment regimen for this patient?