Comparison of solid self-microemulsifying drug delivery system (solid SMEDDS) prepared with hydrophilic and hydrophobic solid carrier

Dong Hoon Oh, Jun Hyeok Kang, Dong Wuk Kim, Beom Jin Lee, Jong Oh Kim, Chul Soon Yong, Han Gon Choi

Research output: Contribution to journalArticlepeer-review

141 Scopus citations

Abstract

In order to compare the effects of hydrophilic and hydrophobic solid carrier on the formation of solid self-microemulsifying drug delivery system (SMEDDS), two solid SMEDDS formulations were prepared by spray-drying the solutions containing liquid SMEDDS and solid carriers. Colloidal silica and dextran were used as a hydrophobic and a hydrophilic carrier, respectively. The liquid SMEDDS, composed of Labrafil M 1944 CS/Labrasol/Trasncutol HP (12.5/80/7.5%) with 2% w/v flurbiprofen, gave a z-average diameter of about 100 nm. Colloidal silica produced an excellent conventional solid SMEDDS in which the liquid SMEDDS was absorbed onto its surfaces. It gave a microemulsion droplet size similar to that of the liquid SMEDDS (about 100 nm) which was smaller than the other solid SMEDDS formulation. In the solid SMEDDS prepared with dextran, liquid SMEDDS was not absorbed onto the surfaces of carrier but formed a kind of nano-sized microcapsule with carrier. However, the drug was in an amorphous state in two solid SMEDDS formulations. Similarly, they greatly improved the dissolution rate and oral bioavailability of flurbiprofen in rats due to the fast spontaneous emulsion formation and the decreased droplet size. Thus, except appearance, hydrophilic carrier (dextran) and hydrophobic carrier (colloidal silica) hardly affected the formation of solid SMEDDS such as crystalline properties, dissolution and oral bioavailability.

Original languageEnglish
Pages (from-to)412-418
Number of pages7
JournalInternational Journal of Pharmaceutics
Volume420
Issue number2
DOIs
StatePublished - 28 Nov 2011

Keywords

  • Colloidal silica
  • Crystalline property
  • Dextran
  • Dissolution
  • Oral bioavailability
  • Solid self-emulsifying drug delivery system

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