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Electrophoretic Delivery of γ-aminobutyric Acid (GABA) into Epileptic Focus Prevents Seizures in Mice
Published on: May 16, 2019
Drug induced encephalopathy in six epileptic patients: topiramate? valproate? or both?
Patrick Latour1, Arnaud Biraben, Elisabeth Polard
1Department of Neurology, Hospital Cavale Blanche, Boulevard Tanguy Prigent, 29200 Brest, France.
Abstract:
Six severe epileptic patients developed stuporous encephalopathy with marked cognitive impairment when topiramate (TPM) and sodium valproate (VPA) were coprescribed for five patients, and when monotherapy with TPM was introduced for one patient. In four patients, ammonaemia increased and then returned to normal after TPM or VPA withdrawal. This severe potential side effect must be recognized. Moreover two distinct mechanisms might explain this toxicity: (1). a pharmacokinetic interaction between VPA and TPM, leading to hyperammonaemia, (2). a pharmacodynamic mechanism due to a direct toxicity of TPM in at-risk epileptic patients.
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