Formulation and In Vitro-In Vivo Correlation of Timolol Maleate Ocular Insert
Journal Title: Indonesian Journal of Clinical Pharmacy - Year 2015, Vol 4, Issue 4
Abstract
The concept of in-vitro and in-vivo correlation studies was used in pharmaceutical research because a simple in-vitro release study on a drug product will be insufficient to predict its therapeutic efficiency. Therefore, correlation between in-vitro release behavior of a drug and its in-vivo absorption in rabbits must be demonstrated experimentally to reproduce therapeutic response. Aim of the study was to study the in vitro and in vivo evaluation and correlation of timolol maleate ocular insert. Timolol maleate ocular inserts were prepared by solvent casting method using guar gum in different proportions (0.25% w/v, 0.50% w/v, 0.75 % w/v, and 1.0% w/v). In vitro transcorneal permeation study was performed on goat cornea using modified Franz diffusion cell. The in vivo study was done using New Zeland albino rabbits and the in vitro invivo correlation (IVIVC) was determined by plotting a graph of in vivo drug release was plotted against in vitro release to determine the correlation. The cumulative % drug releases from the formulation ranged from 50.22±1.41 to 97.72±0.67over a period of 24 h. In vivo release of the timolol maleate from the optimized ocular inserts F2, through conjunctival cul-de-sac of rabbits was 76.03±1.43 at the end of 24 h. A high value of correlation coefficient (r2=0.9965) suggested good correlation between the in vitro-in vivo data of the timolol maleate ocular insert.
Authors and Affiliations
Sunil Thakral, Roshan Issarani, Badri P. Nagori
Keywords
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- EP ID EP360367
- DOI 10.15416/ijcp.2015.4.4.281
- Views 93
- Downloads 0
Formulation and In Vitro-In Vivo Correlation of Timolol Maleate Ocular Insert
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