[Pharmacokinetic interaction between valproic acid and carbapenem-like antibiotics: a discussion of three cases]

Abstract

A number of literature references suggest that carbapenem-like antibiotics decrease plasma concentrations of valproic acid in epileptic patients. This interaction may result in a recurrence of epileptic seizures in these patients. To clarify the possible mechanism of such carbapenem-valproic acid interaction several experimental studies have been carried out in animals. However, the mechanism of this drug-drug interaction is as yet uncertain. in this article we report three new cases that were observed in our hospital within three months. One of these patients developed seizures. We also review the different mechanisms proposed, as well as cases published to this day. All these data demonstrate that care should be taken in using these potent antibiotics in patients receiving valproic acid.