Optimization of Performance Variables of Exemestane Nanosuspension Using Box-Behnken Design to Improve Dissolution and Oral Bioavailability.

Abstract:

PURPOSE:Present investigation was aimed to fabricate nanocrystal of exemestane, an anticancer drug with poor dissolution properties and oral bioavailability. METHODS:Influence of various process parameters on the formulation of exemestane nanosuspension using media milling technique were investigated in the trial batches. Box-Behnken design was applied with independent variables identified in the preliminary studies, viz. X1-Milling time, X2-Amount of stabilizer and X3-Amount of milling agent. In vitro dissolution and in vivo studies were carried out. Solid state characterization (PXRD, SEM, and DSC) studies demonstrated physical changes in drug due to nano-crystallization. Accelerated stability studies of optimized formulation were carried out. RESULTS:Individual process attributes exhibited significant effect on the average particle size of exemestane nanosuspension. Dissolution studies revealed enhancement in drug release rate as compared to pure exemestane powder. The in vivo pharmacokinetic parameters of exemestane nanosuspension showed significant improvement in Cmax and AUC0-t, about 283.85% and 271.63% respectively suggesting amelioration in oral bioavailability by 2.7-fold as compared to pure exemestane. Accelerated stability studies of the optimized formulation suggested stability of the nanocrystals for at least sixmonth period. CONCLUSION:Nanocrystals prepared by media milling technique were successful in improving the poor dissolution properties and oral bioavailability of exemestane.

journal_name

Curr Drug Deliv

journal_title

Current drug delivery

authors

Parmar K,Shah J

doi

10.2174/1567201818999210112190716

subject

Has Abstract

pub_date

2021-01-12 00:00:00

eissn

1567-2018

issn

1875-5704

pii

CDD-EPUB-113251

pub_type

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