Phenytoin elimination in childhood: effect of concentration-dependent kinetics.

Abstract:

:The effect of phenytoin (PHT) concentration on the elimination rate of PHT was evaluated in infants, children, and young adults ranging in age from 1 day to 22 years. As PHT concentration increased, the effective half-life (t50%) increased. In eight children, age 7 months to 4.83 years with initial concentrations between 10 to 20 mg per liter, the average t50% (18.6 hours) was approximately 58% as long as the average in adults with comparable concentrations. Whereas the t50% correlated with the initial PHT concentrations, there was no correlation overall between t50% and age, size, or number of other antiepileptic medications taken. The concentration-dependence of the t50% provided the basis for less frequent dosing than one would expect from previous studies of PHT half-life in children with low concentrations.

journal_name

Neurology

journal_title

Neurology

authors

Dodson WE

doi

10.1212/wnl.30.2.196

subject

Has Abstract

pub_date

1980-02-01 00:00:00

pages

196-9

issue

2

eissn

0028-3878

issn

1526-632X

journal_volume

30

pub_type

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