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http://dx.doi.org/10.4333/KPS.2002.32.3.191

Dissolution Profiles of Solid Dispersions Containing Poorly Water-Soluble Drugs and Solubilizing Compositions  

Kim, Tae-Wan (Biological Rhythm and Controlled Release Lab., College of Pharmacy, Kangwon National University,Pharm Tech Research Incorp.)
Choi, Choon-Young (Biological Rhythm and Controlled Release Lab., College of Pharmacy, Kangwon National University,Pharm Tech Research Incorp.)
Cao, Qing-Ri (Biological Rhythm and Controlled Release Lab., College of Pharmacy, Kangwon National University)
Kwon, Kyoung-Ae (Handok Pharmaceutical Co., LTD.)
Lee, Beom-Jin (Biological Rhythm and Controlled Release Lab., College of Pharmacy, Kangwon National University,Pharm Tech Research Incorp.)
Publication Information
Journal of Pharmaceutical Investigation / v.32, no.3, 2002 , pp. 191-197 More about this Journal
Abstract
Polymer based physical mixtures or solid dispersions containing solubilizing compositions[OA, tween80 and SLS] were prepared using a spray-dryer. Lovastatin(LOS), simvastatin(SIMS), aceclofenac(AFC) and cisapride(CSP) were selected as poorly water-soluble drugs. Dextrin, poly(vinylalcohol) (PVA), poly(vinylpyrrolidone)(PVP) and polyethylene glycol(PEG) were chosen as solubilizing carriers for solid dispersions. The solid dispersions containing solubilizing compositions without drug were prepared without using organic solvents or tedious changes of formulation compositions. This system could be used to quickly screen the dissolution profiles of poorly water-soluble drugs by simply mixing with drugs thereafter. In case of solid dispersion containing drug, organic solvent systems could be used to solubilize model drugs. The dissolution rates of the drugs were higher when mixed with drug and solid dispersions containing solubilizing compositions. However, solid dispersions of LOS, AFC, and CSP simultaneously containing drug and solubilizing compositions in organic solvent systems were more useful than physical mixtures of drug and solid dispersions without drug except SIMS. Based on solubilizing capability of polymer based physical mixtures in gelatin hard capsules, optimal solid dispersion system of poorly water-soluble drugs could be formulated. However, it should be noted that dissolution rate of poorly water-soluble drugs were highly dependent on drug properties, solubilizing compositions and polymeric carriers.
Keywords
Poorly water-soluble drugs; Solubilizing compositions; Solid dispersions; Physical mixtures; Dissolution rate;
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