Abstract
Natural polysaccharides are widely used for development of colon-specific drug delivery systems. The present study was carried out to develop multi-particulate calcium pectinate (Ca-pectinate) formulations for colon-targeted delivery of lornoxicam. The formulations were developed using a combination of polycarbophil and low-methoxy amidated pectin. The beads were prepared using an ionotropic gelation technique. The effects of the polycarbophil and low-methoxy amidated pectin concentrations on the beads characteristics, encapsulation efficiency, swelling study and drug release performance were investigated. The optimized formulation was evaluated for its morphological characteristics. The in vitro drug release of the optimized formulation over a period of 12 h was 96.78 ± 1.35 %. The concentration of the polycarbophil was a decisive factor in sustaining drug release in the colon. The study revealed that optimized Ca-pectinate beads prepared with polycarbophil can efficiently encapsulate lornoxicam. It also showed that these beads can potentially be used for colon-specific delivery of lornoxicam.
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