title: Study of omeprazole-gamma-cyclodextrin complexation in the solid state.
abstract: The possibility of obtaining inclusion complexes between omeprazole (OME) and gamma-cyclodextrin (gamma-CD) by kneading, spray-drying, coprecipitation, and freeze-drying was evaluated. All these methods lead to the isolation of a true inclusion compound, as evidenced by differential scanning calorimetry (DSC), infrared spectroscopy, and X-ray diffractometry on powder (PXRD). Moreover, PXRD and scanning electron microscopy (SEM) afforded data concerning crystallinity and surface characteristics of the solid phases obtained. In all cases, a significant increase of the release rate with respect to the drug alone was found, and it was attributed to the formation of an inclusion compound. Among the solid phases obtained, the comprecipitated product presented the highest dissolution rate.
authors.affiliation: Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Seville, Spain. mjarias@fafar.us.es
authors.forename: M J
authors.initials: MJ
authors.lastname: Arias
authors.forename: J R
authors.initials: JR
authors.lastname: Moyano
authors.forename: P
authors.initials: P
authors.lastname: Muñoz
authors.forename: J M
authors.initials: JM
authors.lastname: Ginés
authors.forename: A
authors.initials: A
authors.lastname: Justo
authors.forename: F
authors.initials: F
authors.lastname: Giordano
mesh_terms: D000897:Anti-Ulcer Agents / Q000737:chemistry*; D002626:Chemistry, Pharmaceutical; D003505:Cyclodextrins / Q000737:chemistry*; D006801:Humans; D009853:Omeprazole / Q000737:chemistry*; D012995:Solubility
chemical_list: D000897:Anti-Ulcer Agents; D003505:Cyclodextrins; D009853:Omeprazole