A 41-year-old woman comes to the physician for a 1-week history of incessant need to void, running to the bathroom 10-12 times daily. Physical examination shows clonus of the left foot. A relative afferent pupillary defect is observed on the right. One month ago, she traveled to Honduras for one week. CSF analysis shows oligoclonal bands. Which of the following is the most appropriate next step in pharmacologic therapy?
Baclofen
Interferon-beta
Methylprednisolone
Praziquantel
Prednisone
