Abstract
The pharmacokinetics of teicoplanin were studied in 15 adult patients in the acute phase of severe infections caused by gram-positive cocci. All the subjects were given a daily intravenous bolus dose of 6 mg of teicoplanin kg-1 (body weight). The pharmacokinetic study was performed over a 48-h period after injection 4. The subjects were categorized according to their mean creatinine clearances (ml.min-1.kg-1) during the study period: group 1 (n = 3), greater than 1.6; group 2 (n = 6), 0.8 to 1.6; and group 3 (n = 6), 0.15 to 0.8. Mean concentrations of teicoplanin in serum at 1, 24, and 48 h were 33 +/- 8, 9 +/- 3, and 6 +/- 2.5 micrograms.ml-1, respectively. The mean half-lives of the concentration-time curve from 12 to 48 h were 28 +/- 4, 44 +/- 24, and 48 +/- 14 h in groups 1, 2, and 3, respectively (group 3 versus group 1: P less than 0.05). The mean area under the serum concentration-time curve from time zero to 24 h was 344 +/- 92 mg.h.liter-1, and the mean hybrid volume of distribution was 1.09 +/- 0.46 liter.kg-1. These values were similar for the three groups, with a trend for larger areas under the curve in group 3. Creatinine clearance correlated directly with the total body clearance of teicoplanin (r = 0.70) and with the renal clearance of teicoplanin (r = 0.82). However, in critically ill patients, the wide interindividual variations in pharmacokinetic parameters are more relevant than those related to the variations in renal function when creatinine clearance is above 0.30 ml.min-1.kg-1. We concluded that, in such conditions, monitoring of concentrations of teicoplanin in serum is mandatory.
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