Sequential, single-dose pharmacokinetic evaluation of meropenem in hospitalized infants and children

J. L. Blumer*, M. D. Reed, G. L. Kearns, R. F. Jacobs, W. M. Gooch, R. Yogev, K. Willims, B. J. Ewing

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

Meropenem is a new carbapenem antibiotic which possesses a broad spectrum of antibacterial activity against many of the pathogens responsible for pediatric bacterial infections. In order to define meropenem dosing guidelines for children, an escalating, single-dose, pharmacokinetic study at 10, 20, and 40 mg/kg of body weight was performed. A total of 73 infants and children in four age groups were enrolled in the study: 2 to 5 months, 6 to 23 months, 2 to 5 years, and 6 to 12 years. The first patients enrolled were those in the oldest age group, who received the lowest dose. Subsequent enrollment was determined by decreasing age and increasing dose. Complete studies were performed on 63 patients. No age- or dose-dependent effects on pharmacokinetic parameter estimates were noted. Mean pharmacokinetic parameter estimates were as follows: half-life, 1.13 ± 0.15 h; volume of distribution at steady state, 0.43 ± 0.06 liters/kg; mean residence time, 1.57 ± 0.11 h; clearance, 5.63 ± 0.75 ml/min/kg; and renal clearance, 2.53 ± 0.50 ml/min/liters kg. Approximately 55% of the administered dose was recovered as unchanged drug in the urine during the 12 h after dosing. No significant side effects were reported in any patients. By using the derived pharmacokinetic parameter estimates, a dose of 20 mg/kg given every 8 h will maintain plasma meropenem concentrations above the MIC that inhibits 90% of strains tested for virtually all potentially susceptible bacterial pathogens.

Original languageEnglish (US)
Pages (from-to)1721-1725
Number of pages5
JournalAntimicrobial agents and chemotherapy
Volume39
Issue number8
DOIs
StatePublished - 1995

ASJC Scopus subject areas

  • Pharmacology
  • Pharmacology (medical)
  • Infectious Diseases

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