Controlled release of donepezil intercalated in smectite clays

Jin Kuen Park, Young Bin Choy, Jae Min Oh, Ju Young Kim, Seong Ju Hwang, Jin Ho Choy

Research output: Contribution to journalArticle

161 Citations (Scopus)

Abstract

The inorganic-organic hybrid for a drug delivery system was successfully realized by intercalating donepezil molecules into smectite clays (laponite XLG, saponite, and montmorillonite). According to the powder XRD patterns, TG profiles, and FT-IR spectra, itwas confirmed that donepezil moleculeswerewell stabilized in the interlayer space of clay via mono or double layer stacking. The adsorption amount and molecular structure of donepezil appeared to depend on the cation exchange capacity of the clay, which in turn, tailored the drug release patterns. Especially in the presence of a bulky cationic polymer (Eudragit® E-100) in the releasemedia, the release ratewas found to be improved due to its effective replacement with intercalated donepezil molecules. Therefore, to formulate a complete drug delivery system, the hybrids were coated with Eudragit® E-100 using a spray dryer, which also showed great enhancement in the release rate during a short period of time (180 min).

Original languageEnglish
Pages (from-to)198-204
Number of pages7
JournalInternational Journal of Pharmaceutics
Volume359
Issue number1-2
DOIs
Publication statusPublished - 2008 Jul 9

Fingerprint

Drug Delivery Systems
Bentonite
Molecular Structure
Powders
Adsorption
Cations
Polymers
donepezil
Smectite
clay
Eudragit-E
Drug Liberation
saponite
laponite

All Science Journal Classification (ASJC) codes

  • Pharmaceutical Science

Cite this

Park, Jin Kuen ; Choy, Young Bin ; Oh, Jae Min ; Kim, Ju Young ; Hwang, Seong Ju ; Choy, Jin Ho. / Controlled release of donepezil intercalated in smectite clays. In: International Journal of Pharmaceutics. 2008 ; Vol. 359, No. 1-2. pp. 198-204.
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Controlled release of donepezil intercalated in smectite clays. / Park, Jin Kuen; Choy, Young Bin; Oh, Jae Min; Kim, Ju Young; Hwang, Seong Ju; Choy, Jin Ho.

In: International Journal of Pharmaceutics, Vol. 359, No. 1-2, 09.07.2008, p. 198-204.

Research output: Contribution to journalArticle

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