Abstract

 Self-emulsifying drug delivery systems (SEDDS) possess unparalleled potential in improving oral bioavailability of poorly water-soluble drugs. Following their oral administration, these systems rapidly disperse in gastrointestinal fluids, yielding micro or nanoemulsions containing the solubilized drug. The objective of the present work was to formulate a self nanoemulsifying drug delivery system (SNEDDS) for naproxen. Naproxen SNEDDS were formulated using Labrafac PG (Oil), Span 80 (Surfactant) and propylene glycol (Co surfactant). The developed SNEDDS were evaluated for turbidimetry, droplet size analysis, zeta potential, refractive index, viscosity, drug content and in vitro diffusion profiles. All formulations of naproxen SNEDDS showed globule size in nanometric range, good stability with no phase separation and rapidly formed clear emulsion. All formulations showed more than 95% of drug release at the end of 60 min. The SEDDS showed improved dissolution rate compared to pure naproxen. Anti-inflammatory studies were conducted in Wistar strain male albino rats and ibuprofen SNEDDS showed more significant activity than the pure drug. The study illustrated the potential of naproxen SNEDDS for oral administration and its biopharmaceutical performance.
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