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      Pharmacokinetics of isepamicin in paediatric patients.

      Journal of Chemotherapy (Florence, Italy)
      Adolescent, Aging, metabolism, Anti-Bacterial Agents, adverse effects, pharmacokinetics, pharmacology, Child, Child, Preschool, Gentamicins, Humans, Infant, Infant, Newborn, Microbial Sensitivity Tests

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          Abstract

          The pharmacokinetics of isepamicin were evaluated in 50 paediatric patients ranging from newborn to 13 years old. Children with subdivided according to age: Group I (6-13 years); Group II (4 months to 6 years); Group III (16 days to 4 months); and Group IV (newborn to 16 days). All patients received isepamicin 7.5 mg/kg every 12 hours except those in Group IV who received 7.5 mg/kg once daily. Isepamicin was administered initially as an intravenous 30-minute infusion and then either intravenously or intramuscularly for between 4 and 12 days. Plasma samples were obtained after the first or second dose on day 1 at 0, 0.5, 1, 4, 6, 8 and 12 hours after the initiation of dosing and at 0.5 and 12 hours on other dosing days. Additional samples were collected in the Group IV patients at 18, 20 and 24 hours. Isepamicin showed a similar plasma concentration-time profile in Groups I, II and III (children from 16 days to 13 years), and in these groups the profile was generally similar to that observed in adults. Neonates up to the age of 16 days (Group IV) showed a distinctly different pharmacokinetic profile: a significantly larger AUC, longer half-life, lower Cmax and lower total body clearance. Isepamicin 7.5 mg/kg administered once daily to children less than 16 days old and twice daily to children aged 16 days to 13 years appears to be pharmacokinetically appropriate. The drug was very well tolerated by children of all age groups.

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