Effect of eslicarbazepine acetate on the pharmacokinetics of metformin in healthy subjects

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Rocha, JF (Author) Other; Vaz Da Silva, M (Author) FMUP; Almeida, L (Author) Other; Falcao, A (Author) Other; Nunes, T (Author) Other; Santos, AT (Author) Other; Martins, F (Author) Other; Fontes Ribeiro, C (Author) Other; Macedo, T (Author) Other; soares-da-silva, p (Author) FMUP

Journal

Title: International Journal of Clinical Pharmacology and Therapeutics

Vol. 47

Pages: 255-261

ISSN: 0946-1965

Publisher: Dustri-Verlag Dr. Karl Feistle

Indexing

ISI Web of Knowledge - 21 Citations

Scopus - 21 Citations

Other information

Authenticus ID: P-003-M4G

Abstract (EN): Purpose: Eslicarbazepine acetate (ESL) is a new voltage-gated sodium channel blocker currently in development for the treatment of neuropathic pain, including that of diabetic origin. The primary objective was to investigate the effect of ESL on the pharmacokinetics of metformin, a commonly used oral antidiabetic drug. Methods: Randomized, open-label, two-way crossover study in 20 healthy subjects. The volunteers received an 850 mg single-dose of metformin hydrochloride on two occasions - once as such and once after pre-treatment with an oral once-daily dose of ESL 1200 mg for 6 days - separated by a washout period of at least 2 weeks. The bioequivalence approach was used for assessing the effect of ESL on the pharmacokinetics of metformin. Test/Reference geometric mean ratios (GMR) and 90% confidence intervals (90% CI) were calculated for AUC(0-infinity), AUC(0-12) and C(max) of metformin. Results: Test/Reference metformin GMR (90% CI) was 0.95 (0.86; 1.05) for AUC(0-infinity), 0.95 (0.88; 1.06) for AUC(0-12), and 0.88 (0.77; 1.00) for C(max). Formal bioequivalence could not be demonstrated for metformin C(max). However, the extent of exposure to metformin, as reflected by AUC(0-12) and AUC(0-infinity), allows the claim of bioequivalence since the 90% CI of the GMR fall within the pre-specified bioequivalence acceptance interval (0.80; 1.25). Conclusion: Once-daily administration of ESL 1,200 mg had no relevant effect on the systemic exposure to metformin pharmacokinetics in healthy subjects.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7