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- Title
In-vitro and in-vivo correlation for two gliclazide extended-release tablets.
- Authors
U. Mandal; K. K. Ray; Veeran Gowda; A. Ghosh; T. K. Pal
- Abstract
The aim of this study was to perform an in-vitro–in-vivo correlation (IVIVC) for two 60-mg gliclazide extended-release formulations (Fast and Slow release) given once a day and to compare their plasma concentrations over time. In-vitro release rate data were obtained for each formulation using the USP apparatus II, paddle stirrer at 50 and 100 rev min−1 in 0.1 M HCl and pH 7.4 phosphate buffer. The similarity factor (f2) was used to analyse the dissolution data. Eighteen healthy subjects participated in the study, conducted according to a completely randomized, two-way crossover design. The formulations were compared using area under the plasma concentration–time curve, AUC0–∞, time to reach peak plasma concentration, Tmax, and peak plasma concentration Cmax, while correlation was determined between in-vitro release and in-vivo absorption. A linear correlation model was developed using percent absorbed data versus percent dissolved data from the two formulations. Predicted gliclazide concentrations were obtained by use of a curve fitting equation. Prediction errors were estimated for Cmax and area under the curve AUC0–∞ to determine the validity of the correlation. 0.1 M HCl at 50 rev min−1 was found to be the most discriminating dissolution method. Linear regression analysis of the mean percentage of dose absorbed versus the mean percentage of in-vitro release resulted in a significant correlation (r2 > 0.98) for the two formulations. An average percent prediction error for Cmax was 4.15% for Fast release and 3.99% for Slow release formulation whereas for AUC0–∞ it was 6.36% and 4.66% for Fast release and Slow release formulation, respectively.
- Subjects
GLICLAZIDE; DRUG tablets; REGRESSION analysis; PHOSPHATES
- Publication
Journal of Pharmacy & Pharmacology, 2007, Vol 59, Issue 7, p971
- ISSN
0022-3573
- Publication type
Article
- DOI
10.1211/jpp.59.7.0009