Dissolution enhancement of poorly water-soluble APIs processed by hot-melt extrusion using hydrophilic polymers
Maniruzzaman, M., Rana, M.M., Boateng, J.S., Mitchell, J.C. and Douroumis, D. (2013) Dissolution enhancement of poorly water-soluble APIs processed by hot-melt extrusion using hydrophilic polymers. Drug Development and Industrial Pharmacy, 39 (2). pp. 218-227. ISSN 0363-9045 (Print), 1520-5762 (Online) (doi:10.3109/03639045.2012.670642)Full text not available from this repository.
The aim of this study was to investigate the efficiency of hydrophilic polymers to enhance the dissolution rate of poorly water-soluble active pharmaceutical ingredients (APIs) processed by hot-melt extrusion (HME). Indomethacin (INM) and famotidine (FMT) were selected as model active substances while polyvinyl caprolactam graft copolymer, soluplus (SOL) and vinylpyrrolidone-vinyl acetate copolymer grades, Kollidon VA64 (VA64) and Plasdone S630 (S630) were used as hydrophilic polymeric carriers. For the purpose of the study, drug–polymer binary blends at various ratios were processed by a Randcastle single screw extruder. The physicochemical properties and the morphology of the extrudates were evaluated through X-ray diffraction (XRD), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). Increased drug loadings of up to 40% were achieved in the extruded formulations for both drugs. INM and FMT exhibited strong plasticization effects with increasing concentrations and were found to be molecularly dispersed within the polymer blends. The in vitro dissolution studies showed increased INM/FMT release rates for all formulations compared to that of pure APIs alone.
|Uncontrolled Keywords:||hot-melt extrusion, dissolution enhancement, solid dispersions, hydrophilic polymers, insoluble drugs|
|Subjects:||R Medicine > RS Pharmacy and materia medica|
|School / Department / Research Groups:||School of Science|
School of Science > Department of Pharmaceutical, Chemical & Environmental Sciences
|Last Modified:||08 May 2013 12:03|
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