title: Lomefloxacin concentrations in bone after a single oral dose.
abstract: We studied the penetration characteristics of lomefloxacin in bone in 30 patients with osteoarthritis undergoing total hip replacement. Patients were given a single oral 400 mg dose at various times from 1 to 12 hours prior to removal of bone samples. The peak plasma and bone (subchondral bone from femoral head) concentrations reached approximately 4.0 micrograms/mL at 2 hours post-dose and 3.0 micrograms/mL at 3 hours post-dose, respectively. At 12 hours post-dose both plasma and bone concentrations were still greater than 1.0 microgram/mL. Two hours after dosing the average bone-to-plasma ratio was greater than 0.6. These data indicate that a single 400 mg oral dose of lomefloxacin attains bone concentrations that are above its usual minimum inhibitory concentrations for susceptible organisms.
authors.affiliation: Hartford Hospital, Connecticut 06115.
authors.forename: A
authors.initials: A
authors.lastname: On
authors.forename: C H
authors.initials: CH
authors.lastname: Nightingale
authors.forename: R
authors.initials: R
authors.lastname: Quintiliani
authors.forename: K R
authors.initials: KR
authors.lastname: Sweeney
authors.forename: H S
authors.initials: HS
authors.lastname: Pasternak
authors.forename: E G
authors.initials: EG
authors.lastname: Maderazo
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000890:Anti-Infective Agents / Q000008:administration & dosage / Q000493:pharmacokinetics*; D001842:Bone and Bones / Q000378:metabolism*; D002851:Chromatography, High Pressure Liquid; D005260:Female; D024841:Fluoroquinolones; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000378:metabolism* / Q000601:surgery; D011292:Premedication; D015363:Quinolones / Q000008:administration & dosage / Q000493:pharmacokinetics*
chemical_list: D000890:Anti-Infective Agents; D024841:Fluoroquinolones; D015363:Quinolones; C053091:lomefloxacin