In general, preferred antibiotics include Ceftriaxone 1 g IM or IV every 12 hours (25 to 37.5 mg / kg in children) for 14 days Various fluoroquinolones (eg, ciprofloxacin 500 mg orally 2 times a day for 10 to 14 days, levofloxacin 500 mg orally or IV once a day for 14 days, moxifloxacin 400 mg orally or IV once a day for 14 days) Chloramphenicol 500 mg orally or IV every 6 hours is still widely used, but resistance is increasing.