title: Comparison of solid self-microemulsifying drug delivery system (solid SMEDDS) prepared with hydrophilic and hydrophobic solid carrier.
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.
authors.affiliation: College of Pharmacy, Yeungnam University, 214-1, Dae-Dong, Gyongsan 712-749, South Korea.
authors.forename: Dong Hoon
authors.initials: DH
authors.lastname: Oh
authors.forename: Jun Hyeok
authors.initials: JH
authors.lastname: Kang
authors.forename: Dong Wuk
authors.initials: DW
authors.lastname: Kim
authors.forename: Beom-Jin
authors.initials: BJ
authors.lastname: Lee
authors.forename: Jong Oh
authors.initials: JO
authors.lastname: Kim
authors.forename: Chul Soon
authors.initials: CS
authors.lastname: Yong
authors.forename: Han-Gon
authors.initials: HG
authors.lastname: Choi
mesh_terms: D000818:Animals; D002152:Calorimetry, Differential Scanning; D003911:Dextrans / Q000737:chemistry / Q000493:pharmacokinetics*; D004337:Drug Carriers / Q000737:chemistry / Q000493:pharmacokinetics*; D004655:Emulsions; D005026:Ethylene Glycols / Q000737:chemistry / Q000493:pharmacokinetics; D005480:Flurbiprofen / Q000097:blood / Q000737:chemistry / Q000493:pharmacokinetics*; D005989:Glycerides / Q000737:chemistry / Q000493:pharmacokinetics; D057927:Hydrophobic and Hydrophilic Interactions; D008297:Male; D008855:Microscopy, Electron, Scanning; D009930:Organic Chemicals / Q000737:chemistry / Q000493:pharmacokinetics; D010316:Particle Size; D011092:Polyethylene Glycols / Q000737:chemistry / Q000493:pharmacokinetics; D051381:Rats; D017207:Rats, Sprague-Dawley; D012822:Silicon Dioxide / Q000737:chemistry / Q000493:pharmacokinetics*; D012995:Solubility; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry / Q000493:pharmacokinetics; D014961:X-Ray Diffraction
chemical_list: D003911:Dextrans; D004337:Drug Carriers; D004655:Emulsions; D005026:Ethylene Glycols; D005989:Glycerides; C514708:Labrafil M 1944 CS; D009930:Organic Chemicals; D013501:Surface-Active Agents; C440220:Labrasol; D011092:Polyethylene Glycols; D005480:Flurbiprofen; D012822:Silicon Dioxide; C010111:carbitol