Naslov
Development and in vitro characterization of chitosan-based microspheres for nasal delivery of promethazine

Autori
Hafner, Anita ; Filipović-Grčić, Jelena ; Voinovich, Dario ; Jalšenjak, Ivan

Izvornik
Drug Development and Industrial Pharmacy (0363-9045) 33 (2007), 4; 427-436

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
promethazine; chitosan; ethylcellulose; microspheres; nasal delivery; spray drying

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Farmacija

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