title: Carbamazepine/betaCD/HPMC solid dispersions. I. Influence of the spray-drying process and betaCD/HPMC on the drug dissolution profile.
abstract: The aim of this study was to compare carbamazepine (CBZ) solid dispersions prepared by spray-drying of aqueous dispersions with the corresponding physical mixtures. The influence of the association of beta-cyclodextrin (betaCD) and hydroxypropyl methylcellulose (HPMC) on the CBZ dissolution profile of the preparations was investigated. Results demonstrated that CBZ release from solid dispersions is dependent on the ratio of betaCD and HPMC. The spray-drying process confers better homogeneity to CBZ polymeric dispersions than the physical mixture process. In summary, we demonstrated the feasibility of obtaining a homogeneous polymeric solid dispersion of CBZ from an aqueous media by spray-drying and a clear influence of the betaCD:HPMC ratio on the release profile of CBZ.
authors.affiliation: Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
authors.forename: Letícia S
authors.initials: LS
authors.lastname: Koester
authors.forename: Paulo
authors.initials: P
authors.lastname: Mayorga
authors.forename: Valquiria L
authors.initials: VL
authors.lastname: Bassani
mesh_terms: D000927:Anticonvulsants / Q000008:administration & dosage / Q000737:chemistry*; D002220:Carbamazepine / Q000008:administration & dosage / Q000737:chemistry*; D002626:Chemistry, Pharmaceutical; D003505:Cyclodextrins / Q000737:chemistry*; D004304:Dosage Forms; D004339:Drug Compounding; D005079:Excipients / Q000737:chemistry; D065347:Hypromellose Derivatives; D008747:Methylcellulose / Q000031:analogs & derivatives* / Q000737:chemistry*; D012995:Solubility; D013678:Technology, Pharmaceutical / Q000379:methods*; D013997:Time Factors; D047392:beta-Cyclodextrins
chemical_list: D000927:Anticonvulsants; D003505:Cyclodextrins; D004304:Dosage Forms; D005079:Excipients; D047392:beta-Cyclodextrins; D002220:Carbamazepine; D065347:Hypromellose Derivatives; D008747:Methylcellulose; C031215:betadex