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J Antimicrob Chemother. 1990 Feb;25:23-31. doi: 10.1093/jac/25.suppl_b.23.

Pharmacokinetics of sodium fusidate after single and repeated infusions and oral administration of a new formulation.

The Journal of antimicrobial chemotherapy

A M Taburet, J Guibert, M D Kitzis, H Sorensen, J F Acar, E Singlas

Affiliations

  1. Clinical Pharmacy, Hôpital Bicêtre, Paris, France.

PMID: 2312443 DOI: 10.1093/jac/25.suppl_b.23

Abstract

The pharmacokinetics of sodium fusidate were studied in eight healthy volunteers (five males and three females) aged 21 to 33 years (29.1 +/- 1.5), weight 46 to 79 kg (61.6 +/- 4.0 kg). First, the subjects were given 500 mg of sodium fusidate by infusion over two hours; secondly, one month later, the volunteers were given 500 mg of fusidate by infusion every eight hours for three days; thirdly, two 250 mg tablets of a new film coated formulation were administered as a single dose. Plasma concentrations of fusidate were measured by HPLC. Peak plasma concentrations reached at the end of the first and the last infusions were 52 +/- 5 mg/l and 123 +/- 12 mg/l respectively. The following mean pharmacokinetic parameters were obtained after single intravenous administration: elimination half-life 10 +/- 1 h, total clearance 22 +/- 2 ml/min and volume of distribution 0.30 +/- 0.04 l/kg. After repeated administration the half-life and the volume of distribution remained unchanged whereas total clearance was halved (11 +/- 1 ml/min). This leads to an experimental accumulation ratio (3.6 +/- 0.2) higher than the theoretical one (1.8 +/- 0.1; P less than 0.01). Consequently, mean trough and peak steady state plasma concentrations (81 +/- 9 and 123 +/- 12 mg/l respectively) are higher than those expected from the single dose kinetics (33 +/- 4 and 76 +/- 7 mg/l respectively). This dose regimen leads to concentrations well above the MIC for most sensitive strains.(ABSTRACT TRUNCATED AT 250 WORDS)

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