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. 2015 Nov;56(11):e172-5.
doi: 10.1111/epi.13114. Epub 2015 Aug 7.

Valproate modulates glucose metabolism in patients with epilepsy after first exposure

Aleksei Rakitin  1   2 , Sulev Kõks  3   4 , Sulev Haldre  1   2
Affiliations
Free article

Valproate modulates glucose metabolism in patients with epilepsy after first exposure

Aleksei Rakitin et al. Epilepsia. 2015 Nov.
Free article

Abstract

Valproate (VPA) treatment has been reported to be associated with weight gain and metabolic changes, such as hyperinsulinemia. The question of whether hyperinsulinemia and other metabolic changes are consequences of increased weight, or are instead direct results of VPA treatment, remains a matter of debate. The aim of the current study was to explore the influence of VPA treatment on glucose and insulin levels during the oral glucose tolerance test (OGTT) directly following the first intravenous (IV) administration. Sixteen patients (18-46 years old) with newly diagnosed epilepsy underwent an OGTT with 75 g glucose prior to the start of VPA treatment, as well as directly following the first IV VPA administration. We observed that plasma glucose levels during the 120 min of OGTT session following infusion of VPA were significantly lower than those measured during OGTT without VPA treatment (mean ± standard deviation [SD] 4.28 ± 0.94 mmol/l vs. 4.75 ± 1.09 mmol/l respectively, p = 0.038). However, blood concentrations of insulin and C-peptide did not differ significantly between the two measurements. This is the first study to show a potential acute glucose-lowering effect of VPA during OGTT in patients with newly diagnosed epilepsy.

Keywords: Glucose; Insulin; Insulin resistance; Valproate; Valproic acid.

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