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  • Title: Pharmacokinetics of cefotaxime in preterm infants.
    Author: Gouyon JB, Pechinot A, Safran C, Chretien P, Sandre D, Kazmierczak A.
    Journal: Dev Pharmacol Ther; 1990; 14(1):29-34. PubMed ID: 2311478.
    Abstract:
    Pharmacokinetic parameters of cefotaxime (CTX) and its metabolite desacetylcefotaxime (DCTX) were assessed on the 3rd day of treatment in 10 preterm infants (28-37 weeks gestation) aged 3-8 days and receiving 25 mg/kg CTX twice daily. Blood samples were collected from an umbilical artery catheter at 0, 0.08, 0.25, 0.5, 0.75, 1, 2, 4, 8, 12 h after a short peripheral infusion (5 min) and were assayed by high-performance liquid chromatography. During the 12 h following the CTX infusion, serum concentrations of CTX remained above the mean bactericidal concentration for pathogens commonly isolated during the neonatal period. The mean (+/- SD) elimination half-life, volume of distribution, total body clearance and area under the serum concentration-time curve (AUC0-12 h) for CTX were: 3.68 +/- 1.48 h (range: 1.89-6.82), 431 +/- 149 ml/kg (219-636), 1.57 +/- 0.80 ml/kg/min (0.60-3.27) and 373 +/- 206 micrograms/ml/h (170-867), respectively. The AUC0-12 h for DCTX was 170 +/- 93 micrograms/ml/h (61-374). A significant inverse relationship was found between gestational age and the elimination half-life of CTX, and the AUC of both CTX and DCTX.
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