Formulation variation and in vitro-in vivo correlation for a rapidly swellable three-layered tablet of tamsulosin HCl

Jun Sang Park, Ji Yeon Shim, Jung Soo Park, Myung Jae Lee, Jong Min Kang, Sung Hoon Lee, Min Chang Kwon, Young Wook Choi, Seong Hoon Jeong

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

In order to develop a preferable once-a-day oral tablet formulation, various formulations of three-layered tablets containing tamsulosin HCl as a hydrophilic model drug were evaluated and compared with a commercial reference, tamsulosin OCAS® . When the test tablet was exposed to a release medium, the medium quickly permeated to the mid-layer and the two barrier layers swelled surrounding the mid-layer rapidly. Volume expansion showed faster and enough swelling of the three-layered tablet up to 2 h. Larger amount of barrier layers caused reduced release kinetics and a high molecular weight polymer showed more resistance against agitation force. A formulation with water-soluble mid-layer showed fast erosion decreasing its volume significantly. On the pharmacokinetic study, the mean ratio of area under the curve (AUC) and Cmax for the test formulation to the reference was 0.69 and 0.84, respectively, showing that the absorption of the drug was less complete than the reference. Plasma concentration at 24 h of the test formulation was higher than the reference. The Wagner-Nelson method showed that decreased initial dissolution rate might be the cause of the less complete absorption. On considering in vitro-in vivo correlation (IVIVC), level A, the reference (R2=0.981) showed more linear relationship than the test (R2=0.918) due to the decreased dissolution and absorption rate of the formulation. This result suggests that the in vitro dissolution profiles and release kinetics might be useful in correlating absorption kinetics as well as overall plasma drug concentration-time profiles for formulation studies.

Original languageEnglish
Pages (from-to)529-535
Number of pages7
JournalChemical and Pharmaceutical Bulletin
Volume59
Issue number5
DOIs
StatePublished - May 2011

Keywords

  • Beagle dog
  • Controlled-release
  • In vitro-in vivo correlation
  • Swelling
  • Tamsulosin
  • Three-layered tablet

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