Pharmacokinetics of carisbamate (RWJ-333369) in healthy Japanese and Western subjects.
Epilepsia
; 50(8): 1850-9, 2009 Aug.
Article
en En
| MEDLINE
| ID: mdl-19453703
ABSTRACT
PURPOSE:
To compare the pharmacokinetics of carisbamate (RWJ-333369) in healthy Japanese and Western adults, and to comparatively assess carisbamate safety and tolerability between the two populations.METHODS:
An open-label study was conducted in 24 Japanese and 24 Caucasian healthy subjects. Subjects received a single oral dose of 250 mg carisbamate on day 1 followed by a 3-day washout period; twice-daily dosing of 250 mg carisbamate on days 5-8; subsequently, 500 mg on days 9-12 and a single dose of 500 mg on day 13. Plasma samples were collected for a pharmacokinetic analysis on days 1, 8, and 13. Plasma and urine samples were analyzed for carisbamate and its urinary metabolites by liquid-chromatography-mass-spectrometry.RESULTS:
Following a single dose, carisbamate Cmax and area under the curve (AUC) geometric mean ratios were 16.4% and 28.8% higher in Japanese than in Caucasians, respectively; these differences were statistically significant and their 90% confidence intervals (CIs) fell outside of the 80-125% limits, which are considered not to be of clinical significance. With dose-body weight normalization, Cmax and AUC were similar in Japanese and Caucasian subjects and the 90% CIs were within the 80-125% boundaries. Carisbamate was well tolerated, and its mean oral clearance and half-life were similar in both groups, ranging from 35.1-41.4 ml/h/kg and 11.5-12.8 h.DISCUSSION:
Carisbamate plasma exposure (AUC) and C(max) in Japanese subjects is approximately 20-25% higher than in Caucasians due to a higher mg/kg dose. After body weight normalization, carisbamate pharmacokinetics was similar between Japanese and Caucasian subjects following single and multiple dosing, and showed the same dose proportionality.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Carbamatos
/
Anticonvulsivantes
Tipo de estudio:
Prognostic_studies
Límite:
Adolescent
/
Adult
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Female
/
Humans
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Male
Idioma:
En
Revista:
Epilepsia
Año:
2009
Tipo del documento:
Article
País de afiliación:
Estados Unidos