Chitosan (CS) based materials in a form of composite with poly(lactic acid) (PLA) granules, films and freeze-dried scaffolds also with blend form with hydroxypropylocellulose (HPC), as well as dibutyrylchitin films were obtained. These structures are intended especially for controlled drug delivery systems, including transdermal and oral dosage forms. Excellent adhesion of biopolymer matrices to PLA microspheres or hydroxyapatite (HAp) particles was proven. The Iorder drug (ibuprofen (IBU)) release kinetics from obtained films is stated.

The paper presents various structural forms of chitosan for medical applications. These are films and microgranules for transdermal and oral application of active substances and porous scaffolds constituting support for the regenerating cells in bone tissue engineering. Tested porous systems were obtained by lyophilization or electrolytic method. Methods of sample preparation and the morphology analyses were presented. The influence of water on properties of transdermal systems and changes in release kinetics of active substances for microgranules and films under modification of their structures, were carried out.

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