Variability in commercial carbamazepine samples - impact on drug release

Flicker, Felicia and Eberle, Veronika Anna and Betz, Gabriele. (2011) Variability in commercial carbamazepine samples - impact on drug release. International journal of pharmaceutics, Vol. 410, H. 1-2. pp. 99-106.

Full text not available from this repository.

Official URL: http://edoc.unibas.ch/dok/A5843689

Downloads: Statistics Overview


The aim of this study was to characterize the variability of commercial carbamazepine (CBZ) samples and to investigate the influence of two commonly used tablet fillers, i.e., mannitol and microcrystalline cellulose (MCC) on the CBZ sample variability. Polymorphism and morphology of CBZ samples were analyzed by differential scanning calorimetry, X-ray powder diffraction, sieve analysis, and scanning electron microscopy. Drug release from CBZ samples and binary mixtures (30-90% drug load) was characterized by a unidirectional dissolution method measuring disk intrinsic dissolution rate (DIDR) and drug release, respectively. All CBZ samples were of p-monoclinic form but differed in their polymorphic purity, particle size, morphology and intrinsic dissolution rate. Two characteristic inflection points, determined in the DIDR profiles, characterized the specific transformation behavior of each CBZ sample. The variability in CBZ samples was also exhibited in the drug release profiles from their binary mixtures. Mannitol increased initial drug release of CBZ samples up to 10-fold in mixtures of 30% drug load. The presence of MCC resulted in reduced variability in drug release. The unidirectional dissolution method is presented as a straightforward monitoring tool to characterize variability of CBZ raw materials and effect of tablet fillers.
Faculties and Departments:05 Faculty of Science > Departement Pharmazeutische Wissenschaften > Ehemalige Einheiten Pharmazie > Industrial Pharmacy Lab (Betz)
UniBasel Contributors:Betz, Gabriele
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
Related URLs:
Identification Number:
Last Modified:14 Sep 2012 07:17
Deposited On:14 Sep 2012 06:38

Repository Staff Only: item control page