title: Bone penetration of enoxacin in patients with and without osteomyelitis.
abstract: Enoxacin concentrations in bone were measured in 24 patients without infection and in 7 with osteomyelitis after one or two doses of 400 mg of enoxacin administered orally or intravenously. Enoxacin concentrations were measured in serum and bone (cortical and cancellous) by high-pressure liquid chromatography. The mean concentration in serum was 2.4 +/- 1.0 micrograms/ml (range, 1.3 to 5.2 micrograms/ml) and was highest after two intravenous doses (3.1 +/- 0.9 micrograms/ml). The mean concentration in cortical bone was 1.0 +/- 0.9 micrograms/g (range, 0.4 to 4.8 micrograms/g) and was highest in patients with osteomyelitis (1.3 +/- 1.6 micrograms/g), but this was not statistically significant. The concentration of enoxacin in cancellous bone was significantly higher than that in cortical bone, with a penetration of 82 versus 40%. Oral enoxacin in practical doses can provide significant levels in bone, and further studies are warranted to determine its therapeutic efficacy in osteomyelitis.
authors.affiliation: Department of Medicine, St. Michael's Hospital, University of Toronto, Ontario, Canada.
authors.forename: I W
authors.initials: IW
authors.lastname: Fong
authors.forename: B R
authors.initials: BR
authors.lastname: Rittenhouse
authors.forename: M
authors.initials: M
authors.lastname: Simbul
authors.forename: A C
authors.initials: AC
authors.lastname: Vandenbroucke
mesh_terms: D000284:Administration, Oral; D000890:Anti-Infective Agents / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*; D001842:Bone and Bones / Q000378:metabolism*; D002853:Chromatography, Liquid; D015365:Enoxacin; D006454:Hemoglobins / Q000378:metabolism; D006801:Humans; D007275:Injections, Intravenous; D008875:Middle Aged; D009287:Naphthyridines / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*; D010019:Osteomyelitis / Q000378:metabolism*
chemical_list: D000890:Anti-Infective Agents; D006454:Hemoglobins; D009287:Naphthyridines; D015365:Enoxacin