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Journal of Pharmaceutics
Volume 2014 (2014), Article ID 105382, 13 pages
Research Article

Formulation and Characterization of Solid Dispersion Prepared by Hot Melt Mixing: A Fast Screening Approach for Polymer Selection

1Piramal Enterprise Limited, 1 Nirlon Knowledge Park, Goregaon East, Mumbai, Maharashtra 400063, India
2Materials Chemistry Division, SAS, VIT University, Tamil Nadu 632014, India
3Department of Pharmaceutics, Bombay College of Pharmacy, Kalina, Mumbai, Maharashtra 400098, India

Received 20 November 2013; Accepted 28 January 2014; Published 12 March 2014

Academic Editor: Sumio Chono

Copyright © 2014 Arno A. Enose et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Solid dispersion is molecular dispersion of drug in a polymer matrix which leads to improved solubility and hence better bioavailability. Solvent evaporation technique was employed to prepare films of different combinations of polymers, plasticizer, and a modal drug sulindac to narrow down on a few polymer-plasticizer-sulindac combinations. The sulindac-polymer-plasticizer combination that was stable with good film forming properties was processed by hot melt mixing, a technique close to hot melt extrusion, to predict its behavior in a hot melt extrusion process. Hot melt mixing is not a substitute to hot melt extrusion but is an aid in predicting the formation of molecularly dispersed form of a given set of drug-polymer-plasticizer combination in a hot melt extrusion process. The formulations were characterized by advanced techniques like optical microscopy, differential scanning calorimetry, hot stage microscopy, dynamic vapor sorption, and X-ray diffraction. Subsequently, the best drug-polymer-plasticizer combination obtained by hot melt mixing was subjected to hot melt extrusion process to validate the usefulness of hot melt mixing as a predictive tool in hot melt extrusion process.