ABSTRACT
Compatibility of granisetron hydrochloride with selected excipients was assessed using Differential Scanning Calorimetry (DSC) as a thermal screening technique. Non-thermal methods like Fourier Transform Infrared spectroscopy and Thin Layer Chromatography were used as complementary techniques to adequately support and assist in interpretation of DSC results. Some drug-excipient interaction was observed with beta-cyclodextrin, 2-hydroxypropyl-beta-cyclodextrin, mannitol, and magnesium stearate in DSC studies. However, further evaluation of these incompatible excipients with non-thermal methods showed that these excipients were compatible with granisetron hydrochloride. Non-thermal methods were, thus, of help in interpreting DSC results and excluding all relevant pharmaceutical incompatibilities.
Subject(s)
Antiemetics/chemistry , Granisetron/chemistry , Calorimetry, Differential Scanning , Chemistry, Pharmaceutical , Chromatography, Thin Layer , Excipients , Glucose , Hypromellose Derivatives , Mannitol , Methylcellulose/analogs & derivatives , Spectroscopy, Fourier Transform Infrared , Tablets , Temperature , beta-CyclodextrinsABSTRACT
The solid-state properties and dissolution profile of bicalutamide beta-cyclodextrin (betaCD) inclusion complex were investigated. The phase solubility profile of bicalutamide with beta-cyclodextrin was classified as A(L)-type. Stability constant with 1:1 molar ratio was calculated from the phase solubility diagram and the aqueous solubility of bicalutamide was found to be enhanced by 86% for beta-cyclodextrin. Binary systems of bicalutamide with betaCD were prepared by the kneading method. The solid-state properties of the complex were characterized by differential scanning calorimetry, Fourier transformation-infrared spectroscopy and X-ray powder diffractometry. It could be concluded that bicalutamide could form an inclusion complex with beta-cyclodextrin. The dissolution profile of the inclusion complex was determined and compared with those of bicalutamide alone and its physical mixture. The dissolution rate of bicalutamide was significantly increased bycomplexation with betaCD, as compared with pure drug and physical mixture.
