Interdependence of particle properties and bulk powder behavior of indomethacin in quench-cooled molten two-phase solid dispersions

Publication date: 25 April 2018 Source:International Journal of Pharmaceutics, Volume 541, Issues 1–2 Author(s): Kristian Semjonov, Maia Salm, Tiina Lipiäinen, Karin Kogermann, Andres Lust, Ivo Laidmäe, Osmo Antikainen, Clare J. Strachan, Henrik Ehlers, Jouko Yliruusi, Jyrki Heinämäki Solid dispersions (SDs) hold a proven potential in formulating poorly water-soluble drugs. The present paper investigates the interfacial phenomena associated with the bulk powder flow, water sorption, wetting and dissolution of the SDs prepared by a modified melt and quench-cooling (QC) method. Poorly water-soluble indomethacin (IND) was QC molten with solubilizing graft copolymer (Soluplus®) or polyol sugar alcohol (xylitol, XYL). The interfacial interactions of SDs with air/water were found to be reliant on the type (amorphous/crystalline) and amount of the carrier material used. The final SDs were composed of fused agglomerates (SOL) or large jagged particles (XYL) with good wetting and powder flow properties. The initial dissolution of IND was accelerated by both carrier materials studied. The QC molten SDs with amorphous Soluplus® significantly improved the dissolution rate of IND at pH 6.8 (79.9 ± 0.2% at 30 min) compared to that of pure crystalline drug. The substantial improvement in the dissolution rate of IND was in connection with the amorphous state of the drug being stabilized by Soluplus® in the QC molten SDs. However, it is evident that a strong H-bon...
Source: International Journal of Pharmaceutics - Category: Drugs & Pharmacology Source Type: research