Journal
EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES
Volume 13, Issue 2, Pages 159-168Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0928-0987(00)00217-7
Keywords
beads; chitosan succinate; hydroxamated chitosan succinate; iron(III) crosslinking; sustained release; theophylline
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Chitosan succinate (CS) and hydroxamated chitosan succinate (HCS) were prepared. The generated semisynthetic polymers were employed in the formation of drug-loaded, iron(III)-crosslinked polymeric beads. Infrared spectroscopy was employed to prove the crosslinking. The produced beads were evaluated in vitro as drug prolonging and potentially orally administered delivery system. Theophylline was used as the loaded model drug. The generated beads proved to be successful in prolonging drug release. Iron leaching from the generated beads was minimal (<2%)- and it only took place under acidic conditions (pH 1). (C) 2001 Elsevier Science B.V. All rights reserved.
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