Poorly Water-soluble Drugs for Oral Delivery -A Challenge for Pharmaceutical Development Part I: Physicochemical and biopharmaceutical background / Strategies in pharmaceutical development Norbert Rasenacka and Bernd W. Müllera,b Pharmatech GmbHa, Flintbek (Germany), and Department of Pharmaceutics and Biopharmaceutics, Christian Albrecht University Kielb, Kiel (Germany) Several New Chemical Entities (NCEs) in pharmaceutical research are poorly water-soluble which often results in an insufficient bioavailability from common oral dosage forms. This presents a challenge to develop suitable drug delivery systems for oral use which ensure that the drug has sufficient bioavailability. Several technologies exist for increasing the dissolution rate and/or the solubility. This review series in three parts presents pharmaceutical technologies and points out advantages and disadvantages. Key words Bioavailability • Dissolution rate • Oral drug delivery systems, in vitro and in vivo characterization • Poorly water-soluble drugs • Solubility |
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pharmind 2005, Nr. 3, Seite 323