Journal of Antimicrobial Chemotherapy (1994) 33, 823-835
© 1994 The British Society for Antimicrobial Chemotherapy
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Once-daily gentamicin versus once-daily netilmicin in patients with serious infectionsa randomized clinical trial
aDepartment of Internal Medicine, Unit for Infectious Diseases and Tropical Medicine Room F4-222, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands bMedical Microbiology, Academic Medical Center Room F4-222, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands cOto-Rhino-Laryngology, Academic Medical Center Room F4-222, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
Received 27 September 1993; accepted 20 December 1993
Consecutive patients with serious infections were randomized between gentamicin 4 mg/kg once daily iv or netilmicin 55 mg/kg once daily iv (with dosage reduction in case of renal dysfunction). Exclusion criteria were neutropenia or severe renal failure. Median first serum trough and peak concentrations were 04/95 mg/L and 04/122 mg/L, for gentamicin and netilmicin respectively. A good clinical response was observed in 50/54 (926%) evaluable patients treated with gentamicin and in 48/52 (923%) netilmicin-treated patients. Nephrotoxicity (a rise of serum creatinine
45 µmol/L) developed in 5/72 (69%) gentamicin patients treated
48 hours and in 10/69 (14/5%) netilmicin patients (difference 75%, 95% CI 39% to + 162%). High-tone audiometry was performed when possible; no significant differences were found between the regimens with regard to hearing loss or prodromal signs of ototoxicity. We conclude that with once-daily dosing no benefit of netilmicin over gentamicin regarding nephro- or ototoxicity could be demonstrated.
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