Indomethacin pharmacokinetics in neonates: the value of volume of distribution as a marker of permanent patent ductus arteriosus closure.

Abstract:

:Indomethacin (INDO) pharmacokinetics were examined in 18 neonates on 19 occasions, before and after patent ductus arteriosus (PDA) closure. Patients received INDO as an initial dose of 0.25 mg/kg intravenously, and INDO serum concentrations were measured 2 and 8 h after the dose. Subsequent doses were individualized based on clinical response, toxicity, and INDO pharmacokinetics. PDA status was confirmed echocardiographically at the start and end of therapy. INDO pharmacokinetic parameters varied from dose-to-dose within the same patient, and wide interpatient variability was also observed. Pre- and post-PDA closure, only INDO volume of distribution differed significantly (p less than 0.001) with mean values of 0.36 (+/- 0.06) L/kg and 0.26 (+/- 0.08) L/kg. The reason for this occurrence remains unclear. However, a new application for pharmacokinetics as a probe of physiology is demonstrated.

journal_name

Ther Drug Monit

authors

Gal P,Ransom JL,Weaver RL,Schall S,Wyble LE,Carlos RQ,Brown Y

subject

Has Abstract

pub_date

1991-01-01 00:00:00

pages

42-5

issue

1

eissn

0163-4356

issn

1536-3694

journal_volume

13

pub_type

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