Development and in vitro characterization of chitosan-based microspheres for nasal delivery of promethazine |
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| Authors: | Hafner Anita Filipović-Grcić Jelena Voinovich Dario Jalsenjak Ivan |
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| Affiliation: | a Department of Pharmaceutics, Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatiab Department of Pharmaceutical Sciences, University of Trieste, Trieste, Italy |
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| Abstract: | Conventional and composed promethazine-loaded microspheres were prepared by spray drying of chitosan solution systems and double water-in-oil-in-water (W/O/W) emulsion systems, respectively. Double emulsions were prepared in two different feed concentrations, with chitosan dissolved in both water phases, and ethylcellulose dissolved in oil phase. Swelling and bioadhesive properties of the microspheres depended on the chitosan content, type and the feed concentration of spray-dried system. Results obtained suggested that better ethylcellulose microcapsules with promethazine in the chitosan matrix were formed when less concentrated emulsion systems were spray-dried. Thus, in case of such a system, with ethylcellulose/chitosan weight ratio of 1:2, prolonged promethazine release was obtained. |
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| Keywords: | Promethazine Chitosan Ethylcellulose Microspheres Nasal delivery Spray drying |
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