Comparison of netilmicin and gentamicin pharmacokinetics in humans

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Abstract
In a crossover study, single doses of netilmicin and gentamicin were administered intramuscularly, each at 1.0 and 2.5 mg/kg. The serum concentrations, analyzed by a two-compartment open model with a first-order absorption, indicated that the pharmacokinetics of the drugs are essentially the same. Both drugs were rapidly absorbed and distributed after administration. No significant differences were observed between the two drugs in disposition half-life, rate of distribution and elimination, area under the serum concentration-time curve, urinary excretion, total body clearance, and renal clearance. After 1.0 mg/kg, the maximum serum concentration of netilmicin (5.18 microgram/ml) was only slightly lower than that for gentamicin (5.76 microgram/ml), but no difference was found after the 2.5-mg/kg dose.

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