title: [Preparation and in vitro characterization of berberine hydrochloride--self-emulsifying microsphere by membrane emulsification technology].
abstract: This paper reports a new solid self-emulsifying drug delivery system--self-emulsifying microsphere prepared by membrane emulsification technology with the hydrophobic berberine hydrochloride as a model drug. Solubility test and pseudo-ternary phase diagram were employed to select the optimal prescription of liquid self-emulsifying drug delivery system. The self-emulsifying microsphere was prepared by membrane emulsification technology with the solid carrier in a gel formed by sodium alginate and calcium chloride. The results showed that the optimal prescription of liquid self-emulsifying drug delivery system was Capmul MCM/Cremophor RH40/Labrasol/1-2propanediol = 20 : 32 : 32 : 16. The solid self-emulsifying microsphere had average diameter of 10.92 microm, encapsulation efficiency of 32.57% and the droplet size of reconstituted micromulsion of 156.5 nm. Berberine hydrochloride was dispersed in microsphere in non-crystalline form. In vitro release of the self-emulsifying microsphere showed pH response characteristics. These results indicated that the self-emulsifying microsphere prepared by membrane emulsification technology might become a new dosage form for poorly water soluble drugs.
authors.affiliation: School of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China.
authors.forename: Hong-Qiao
authors.initials: HQ
authors.lastname: Li
authors.forename: Tao
authors.initials: T
authors.lastname: Yi
mesh_terms: D001599:Berberine / Q000008:administration & dosage* / Q000737:chemistry; D016503:Drug Delivery Systems / Q000379:methods*; D004655:Emulsions; D008863:Microspheres; D010316:Particle Size; D012995:Solubility; D013678:Technology, Pharmaceutical / Q000379:methods*
chemical_list: D004655:Emulsions; D001599:Berberine