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Use Of Coarse Ethylcellulose And PEO In Beads Produced By Extrusion-spheronization.
R. Mallipeddi, Kalyan K. Saripella, S. Neau
Published 2010 · Materials Science, Medicine
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This study evaluated the potential of coarse ethylcellulose (CPEC) and high molecular weight polyethylene oxide (PEO) as excipients in the production of beads by extrusion-spheronization. CPEC was investigated as a diluent and PEO as an extrusion aid and a binder. Beads were manufactured with caffeine as a model drug. Release studies were conducted, and the bead size, shape, yield, and friability were determined. The effects of formulation and process variables and their interactions were studied by a sequential experimental design based on a response surface method. In the initial stage, a two level half fractional factorial design was employed as a screening design, which was subsequently augmented to a central composite design. Statistical analysis indicated that formulation variables including PEO content, microcrystalline cellulose (MCC) content, and water content, and two process variables, namely spheronizer speed and spheronization time, significantly affected the properties of the beads. Interactions between two factors have significant effects on several of the measured responses. Simultaneous optimization of the responses was conducted and validated by performing experiments at the optimal conditions. Overall, the results confirmed that immediate release, spherical beads with low friability and narrow size distribution could be produced with minimal amounts of MCC.
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