IBUPROFEN LOADED ORGANOGEL: DEVELOPMENT AND CHARACTERIZATION
Keywords:Microemulsion, Organogel, Phase-behavior, Gel-sol transition temperature, Fractal dimension, Ibuprofen, In vitro release, Pharmacokinetics
Objective: This study aimed to develop and in vitro characterize an organogel (OG) loaded Ibuprofen.
Methods: Organogel (OG) composed of water, isooctane, sorbitan esters, sorbitan monopalmitate (Span-40), and poly(oxyethylene) sorbitan monostearate (Polysorbate-60) was loaded with Ibuprofen. The partial phase behavior of ibuprofen OG was studied to optimize the formulation composition. 1.0% w/w Ibuprofen loaded OG were characterize for rheological, in vitro release and stability study.
Results: Phase diagram showed an isotropic gel region at low water contents, which converted to emulsion on increasing water quantity. The rheological properties of the OG incorporating 1.0% w/w Ibuprofen shows the presence of two Tg’s and elastic behavior of gel, reflects the presence of an entangled network of aqueous tubules. The fractal dimension df value of 2.1 and 2.3 was obtained for the two curves (elastic and storage modulus), which is indicative of the formation of the densest gel structure. The diffusional release exponent (n) was found to be ~0.7 (0.5<n<1), which is indicative of non-Fickian, anomalous diffusion of the drug from the OG. The in vitro drug release exhibited release @ 7.04%/h 0.7/cm2 from the OG. Ibuprofen containing OG was stable for 28 d in terms of chemical potency and gel stiffness at 4 °C and room temperature (~25 °C).
Conclusion: The study indicates the potential of OG for improved transdermal delivery of Ibuprofen.
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