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Phenytoin and folic acid: individualized drug-drug interaction

Authors :
Lawrence J. Fischer
Michael P. Rivey
Dorothy D. Schottelius
Boris A. Vern
Mary J. Berg
Source :
Therapeutic drug monitoring. 5(4)
Publication Year :
1983

Abstract

The effect of folic acid supplementation on the disposition of phenytoin and the resultant loss of seizure control in a male folate-deficient epileptic is reported. Due to the increase in tonic-clonic seizures after the initiation of folic acid (1 mg, orally) the sodium phenytoin dosage was increased by 130 mg until control was achieved. Because of these dosage changes, the Vmax and Km were calculated before and after initiation of the folic acid. The Vmax remained relatively the same, but the Km decreased after folate supplementation.

Details

ISSN :
01634356
Volume :
5
Issue :
4
Database :
OpenAIRE
Journal :
Therapeutic drug monitoring
Accession number :
edsair.doi.dedup.....0a858986032481ce12eb1e630bcb8ef9