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Renal tolerability of four different once-daily dose regimen of netilmicin in critical care patients.

A prospective, randomized trial was conducted in a medical intensive care unit to assess safety and tolerability of four different dose regimens of intravenous netilmicin given once daily in the treatment of febrile episodes in critically ill patients. Eighty patients with febrile episodes during their stay in the intensive care unit were included in the study. The patients were randomized into four groups: Group 1 received a single daily dose of netilmicin based upon weight, age and renal function according to a dosage nomogram [13] (mean dose 298 +/- 29 mg, median 300 mg, range 250-350 mg), group 2 received 150% of this standard dose (mean 418 +/- 45 mg, median 400 mg, range 350-500 mg), group 3 200% (mean 525 +/- 41 mg, median 500 mg, range 400-550 mg) and group 4 250% (mean 710 +/- 39 mg, median 650 mg, range 600-750 mg). Duration of treatment was six days. Positive cultures were obtained in 29 patients. Serum creatinine and creatinine clearance, as well as netilmicin trough levels and levels of alpha 1-microglobulin showed no significant difference between the groups before, during, and after therapy. Our results indicate that with once daily dosing even high doses of netilmicin are well tolerated in patients with a creatinine clearance of > 70 ml/min before therapy. Necessary precautions include monitoring of drug trough levels (< 1 mg/L) and maintenance of adequate volume status.