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Journal of Applied Pharmaceutical Science
Article . 2016 . Peer-reviewed
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Lipid-Based Delivery System for Topical Phenytoin

Authors: Siang Lee; Yeong Pung; Boon Khor; Wei Kong; Cai Tan; Siew Teo;

Lipid-Based Delivery System for Topical Phenytoin

Abstract

The wound healing effect of topical phenytoin has been reported but its effective delivery system is still under-researched. The present work aimed to formulate topical lipid-based gels for effective delivery of phenytoin. Three lipid-based emulsions with different droplet sizes were prepared using coconut kernel oil (CKO) and soybean oil (SBO) blends as an oil phase. Stable lipid-based emulsion with 100% emulsion stability index (ESI) over seven heating/cooling cycles could only be formed when the oil droplet satisfied the nano size criterion, as demonstrated by nano-emulsion. The stability of macro-emulsion and cream could be enhanced by the addition of Aristoflex ammonium acryloyldimethyl-taurate/VP (AVC) copolymer as the gelling agent. These gels, designated as nano-emulgel, macro-emulgel and cream-gel, were subsequently loaded with phenytoin. All gels exhibited non-Newtonian and shear-thinning flow behavior, with high yield stress ranged 18.8 – 51.5 Pa. The in vitro drug release profiles of all formulations followed the first-order kinetic model, with R2 > 0.95. It was found that lipid nano-emulgel demonstrated the highest release rate of phenytoin, with 93.12% drug released in 12 hours, followed by cream-gel with 56.42% and macro-gel with 51.51%. CKO/SBO nano-emulgel was identified as the most suitable lipid topical gel formulation for effective delivery of phenytoin.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
11
Top 10%
Average
Top 10%
gold