Pharmacokinetics and tissue penetration of orally administered lomefloxacin.

Abstract

The pharmacokinetics of the quinolone lomefloxacin were determined following a single 400-mg oral dose given to each of six male volunteers. Concentrations in serum, urine, and cantharidin-induced inflammatory fluid were determined by a microbiological assay. Samples from two volunteers were also assayed by high-performance liquid chromatography. The mean peak level in serum, 4.7 micrograms/ml, was attained within 1 h of administration. The mean elimination half-life from serum was 7 h. Inflammatory fluid was penetrated rapidly, with a mean peak level of 3.5 micrograms/ml occurring after 2.7 h. The mean recovery of lomefloxacin from urine over 48 h was 76% of the administered dose. There was a minor peak on the high-performance liquid chromatography trace, suggesting a small amount of unidentified metabolite. This was present only in urine; no detectable metabolites were found in serum. This study suggests that either once-daily or twice-daily dosage of lomefloxacin should be sufficient to treat urinary or systemic infections, respectively, caused by susceptible pathogens.

• Authors: J W Stone, J M Andrews, J P Ashby, D Griggs, R Wise
• Journal: Antimicrobial agents and chemotherapy (Antimicrob Agents Chemother) Vol. 32 Issue 10 Pg. 1508-10 (Oct 1988) ISSN: 0066-4804 [Print] United States
• PMID: 3190181 (Publication Type: Journal Article)

Chemical References

• 4-Quinolones
• Anti-Infective Agents
• Fluoroquinolones
• Quinolones
• lomefloxacin

Topics

• 4-Quinolones
• Administration, Oral
• Adult
• Anti-Infective Agents (administration & dosage, pharmacokinetics)
• Body Fluids (analysis)
• Chromatography, High Pressure Liquid
• Fluoroquinolones
• Half-Life
• Humans
• Male
• Quinolones
• Urinary Tract Infections (drug therapy)