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Simulation of gastric lipolysis and prediction of felodipine release from a matrix tablet in the fed stomach
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmacy.
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2009 (English)In: European Journal of Pharmaceutical Sciences, ISSN 0928-0987, E-ISSN 1879-0720, Vol. 37, no 2, 133-140 p.Article in journal (Refereed) Published
Abstract [en]

The importance of intragastric lipolysis to felodipine release from a hydrophilic, extended release tablet in the fed stomach was assessed in USP II apparatus with the tablet fixed on a steel wire above the paddle. The release medium, homogenized long-life milk, was gradually digested with shots of acidic solutions of pepsin over the course of the experiment in absence and in presence of biorelevant concentrations of a lipase that was similar to human gastric lipase. Percentage tablet erosion at specific times in the same media was measured in separate experiments. The data were compared to published data for intragastric release in fed healthy adults. In all cases, felodipine release occurred under sink conditions. Lipase facilitated felodipine release from the eroded polymer, bringing the release profile closer to the in vivo data. Likewise, the relationship between tablet erosion and amount of released felodipine reflected the in vivo data only when lipase was added to the medium. It was concluded that modelling intragastric lipolysis is necessary in order to simulate felodipine release from the extended release tablets in the fed stomach.

Place, publisher, year, edition, pages
2009. Vol. 37, no 2, 133-140 p.
Keyword [en]
Intragastric release, Felodipine, Fed state, Biorelevant media, HPMC tablet
National Category
Pharmaceutical Sciences
URN: urn:nbn:se:uu:diva-123114DOI: 10.1016/j.ejps.2009.02.003ISI: 000265341300009PubMedID: 19429420OAI: oai:DiVA.org:uu-123114DiVA: diva2:312394
Available from: 2010-04-23 Created: 2010-04-23 Last updated: 2010-10-11Bibliographically approved

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