title: Stabilisation of amorphous ibuprofen in Upsalite, a mesoporous magnesium carbonate, as an approach to increasing the aqueous solubility of poorly soluble drugs.
abstract: One attractive approach to increase the aqueous solubility and thus the bioavailability of poorly soluble drugs is to formulate them in their amorphous state since amorphous compounds generally exhibit higher apparent solubilities than their crystalline counterparts. In the current work, mesoporous magnesium carbonate was used to stabilise the amorphous state of the model substance ibuprofen. Crystallisation of the drug was completely supressed in the formulation, resulting in both a higher apparent solubility and a three times faster dissolution rate of the drug where the drug release was shown to be diffusion controlled. It was also shown that the formulation is stable for at least three months when stored at 75% relative humidity. The simple synthesis together with a high loading capacity and narrow pore size distribution of the mesoporous magnesium carbonate is foreseen to offer great advantages in formulations of poorly soluble drugs.
authors.affiliation: Division for Nanotechnology and Functional Materials, Department for Engineering Sciences, P.O. Box 534, SE-751 21 Uppsala, Sweden. Electronic address: peng.zhang@angstrom.uu.se.
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.affiliation: Division for Nanotechnology and Functional Materials, Department for Engineering Sciences, P.O. Box 534, SE-751 21 Uppsala, Sweden. Electronic address: johan.forsgren@angstrom.uu.se.
authors.forename: Johan
authors.initials: J
authors.lastname: Forsgren
authors.affiliation: Division for Nanotechnology and Functional Materials, Department for Engineering Sciences, P.O. Box 534, SE-751 21 Uppsala, Sweden; Science for Life Laboratory, Uppsala University, P.O. Box 534, SE-751 21 Uppsala, Sweden. Electronic address: maria.stromme@angstrom.uu.se.
authors.forename: Maria
authors.initials: M
authors.lastname: Strømme
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000737:chemistry*; D002626:Chemistry, Pharmaceutical; D003460:Crystallization; D065546:Drug Liberation; D004355:Drug Stability; D007052:Ibuprofen / Q000737:chemistry*; D008274:Magnesium / Q000737:chemistry*; D016062:Porosity; D012995:Solubility
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; C005479:magnesium carbonate; D008274:Magnesium; D007052:Ibuprofen
keywords: Bioavailability; Ibuprofen; Magnesium carbonate; Mesoporous; Poorly soluble drug