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Research Article

Improved oral bioavailability of glyburide by a self-nanoemulsifying drug delivery system

, , , , , & show all
Pages 277-283 | Received 14 Feb 2013, Accepted 26 Aug 2013, Published online: 18 Feb 2014
 

Abstract

Aim: The present study aimed at the development and characterisation of self-nanoemulsifying drug delivery system (SNEDDS) to improve the oral bioavailability of poorly soluble glyburide.

Methods: The solubility of glyburide was determined in various oils, surfactants and co-surfactants which were grouped into two different combinations to construct ternary phase diagrams. The formulations were evaluated for emulsification time, droplet size, zeta-potential, electrical conductivity and stability of nanoemulsions.

Result: The optimised SNEDDS loading with 5 mg/g glyburide comprised 55% Cremophor® RH 40, 15% propanediol and 30% Miglyol® 812, which rapidly formed fine oil-in-water nanoemulsions with 46 ± 4 nm particle size. Compared with the commercial micronised tablets (Glynase®PresTab®), enhanced in vitro release profiles of SNEDDS were observed, resulting in the 1.5-fold increase of AUC following oral administration of SNEDDS in fasting beagle dogs.

Conclusions: These results indicated that SNEDDS is a promising drug delivery system for increasing the oral bioavailability of glyburide.

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