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  • Title: Chloramphenicol pharmacokinetics in the newborn.
    Author: Rajchgot P, Prober C, Soldin S, Golas C, Good F, Harding L, MacLeod S.
    Journal: Dev Pharmacol Ther; 1983; 6(5):305-14. PubMed ID: 6628162.
    Abstract:
    We studied pharmacokinetics of chloramphenicol in 9 neonates having a mean gestational age of 31.2 +/- 1.9 weeks (mean +/- SEM). The studied dose was the final dose of treatment in 8 of these and the first dose in 2 of these. 1 neonate was studied twice. Concentrations of chloramphenicol and its 3-monosuccinate and 1-monosuccinate esters were measured in serum by high performance liquid chromatography. Apparent total body clearance of chloramphenicol correlated with postnatal age (r = 0.81, p less than 0.01). Mean apparent clearance was 1.1 ml X min-1 X kg-1. Serum concentrations of succinate esters were below assay sensitivity after 6 h postdose. Factors leading to excessive chloramphenicol concentrations (greater than 25.0 mg/l) were evaluated in another 44 newborns. Instability of the patient's clinical condition was an important cause of excessive serum concentrations during ongoing therapy.
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