Tolerance of once-daily dosing of netilmicin and teicoplanin, alone or in combination, in healthy volunteers

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Abstract
The purposes of this study were to test the pharmacokinetics and renal and otologic tolerances of a once-daily regimen of netilmicin and teicoplanin administered intramuscularly, alone or in combination (4.5 and 6 mg/kg, respectively), for 7 days in 30 healthy male volunteers. Teicoplanin induced only a mild increase in enzymuria. Nephrotoxicity was moderate and reversible with netilmicin; there was increased enzymuria and alteration in diluting ability, without significant changes in urinary .beta.2-microglobulin levels, concentrating ability, and glomerular fitration rate. Ototoxicity was not detected in any of the subjects. Our results suggest that (1) teicoplanin and netilmicin given once daily induced only slight, reversible tubular damage, without any sign of ototoxicity; (2) their combination was not more toxic; and (3) clinical studies can be envisaged to evaluate the efficacy and tolerance of once-daily regimens in long-term treatment.