Neuroborreliosis (Nervous System Lyme Disease).

Treatment of nervous system Lyme disease depends on the severity and site of involvement. Although some data indicate that uncomplicated Lyme meningitis can be treated effectively with oral doxycycline, central nervous system infection (meningitis, radiculitis, encephalomyelitis, and cranial neuritis) is usually treated with parenteral antibiotics for 14 to 30 days, depending on disease severity, as is severe and progressive peripheral nervous system involvement. Ceftriaxone, 2 g/d, is the most commonly used regimen; cefotaxime, 2 g every 8 hours, appears to be equally effective. Penicillin in meningeal doses is also effective, perhaps slightly less so than the third-generation cephalosporins, but it is less convenient to administer. For patients with prohibitive drug allergies, treatment with oral doxycycline in doses of 300 to 400 mg/d may be effective. In patients with facial palsy or with indolent peripheral neuropathies, a trial of oral medication (doxycycline, 100 mg two or three times a day, or amoxicillin, 500 to 1000 mg three times a day for 21 to 30 days) is reasonable. Patients for whom this fails are treated with parenteral medications.