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pubmed-article:12176292pubmed:abstractTextA new process, evaporative precipitation into aqueous solution (EPAS) has been developed to coat poorly water soluble drugs, in this case carbamazepine, with hydrophilic stabilizers to enhance dissolution rates. A heated organic solution of the drug in dichloromethane is sprayed though a fine nozzle into a heated aqueous solution. The rapid evaporation of the organic solvent produces high supersaturation and rapid precipitation of the drug in the form of a colloidal suspension that is stabilized by a variety of low molecular weight and polymeric surfactants. The stabilizer adsorbs to the drug surface and prevents particle growth and crystallization during the spray process. The suspensions are dried by spray drying or ultra-rapid freezing. The high dissolution rates are a consequence of the following advantages of the EPAS process: a small primary particle size, a hydrophilic coating on the particles that enhances wetting, and low crystallinity.lld:pubmed
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pubmed-article:12176292pubmed:copyrightInfoCopyright 2002 Elsevier Science B.V.lld:pubmed
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pubmed-article:12176292pubmed:pagination17-31lld:pubmed
pubmed-article:12176292pubmed:dateRevised2009-11-19lld:pubmed
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pubmed-article:12176292pubmed:articleTitleEnhanced drug dissolution using evaporative precipitation into aqueous solution.lld:pubmed
pubmed-article:12176292pubmed:affiliationDepartment of Chemical Engineering, University of Texas at Austin, Austin, TX 78712-1062, USA.lld:pubmed
pubmed-article:12176292pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:12176292pubmed:publicationTypeResearch Support, U.S. Gov't, Non-P.H.S.lld:pubmed
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