2017
Population Pharmacokinetics of Amoxicillin in Term Neonates Undergoing Moderate Hypothermia
Publication
Publication
The pharmacokinetics (PK) of amoxicillin in asphyxiated newborns undergoing moderate hypothermia were quantified using prospective data (N = 125). The population PK was described by a 2-compartment model with a priori birthweight (BW) based allometric scaling. Significant correlations were observed between clearance (Cl) and postnatal age (PNA), gestational age (GA), body temperature (TEMP), and urine output (UO). For a typical patient with GA 40 weeks, BW 3,000 g, 2 days PNA (i.e., TEMP 33.5°C), and normal UO, Cl was 0.26 L/h (interindividual variability (IIV) 41.9%) and volume of distribution of the central compartment was 0.34 L/kg (IIV of 114.6%). For this patient, Cl increased to 0.41 L/h at PNA 5 days and TEMP 37.0°C. The respective contributions of both covariates were 23% and 27%. Based on Monte Carlo simulations we recommend 50 and 75 mg/kg/24h amoxicillin in three doses for patients with GA 36-37 and 38-42 weeks, respectively.
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doi.org/10.1002/cpt.748, hdl.handle.net/1765/102402 | |
Clinical Pharmacology and Therapeutics | |
Organisation | Erasmus MC: University Medical Center Rotterdam |
Bijleveld, Y., Mathot, R., van der Lee, J., Groenendaal, F., Dijk, P., van Heijst, A., … de Haan, T. R. (2017). Population Pharmacokinetics of Amoxicillin in Term Neonates Undergoing Moderate Hypothermia. Clinical Pharmacology and Therapeutics. doi:10.1002/cpt.748 |