Abstract:
Combinations of (3β)-17-(pyridin-3-yl)androsta-5,16-dien-3-yl acetate (Abiraterone acetate) with acidic substances such as citric acid, ascorbic acid, methyl-4-hydroxy benzoate, saccharin, vanillic acid, adipic acid, maleic acid, malic acid, tartaric acid are useful as pharmaceutical preparations and show improved properties such as aqueous solubility and dissolution kinetics, especially in the form of cocrystals or their combination with a suitable acid.
Abstract:
The present invention primarily relates to multi-component crystals comprising a compound of formula 1 and a second compound selected from the group consisting of co-crystal formers and solvents. The invention is further related to pharmaceutical compositions comprising such multi-component crystals. Furthermore, the invention relates to processes for preparing said multi-component crystals. The invention also relates to several aspects of using said multi-component crystals or pharmaceutical compositions to treat a disease.
Abstract:
The present invention relates to a method for producing an aqueous suspension concentrate formulation and novel suspension concentrate formulations of the compound of formula I. The method comprises: a) providing an aqueous slurry of coarse particles of the compound of the formula I, where the compound of the formula I is at least partially present in its crystalline form B, which, in an X-ray powder diffractogram at 25° C. and Cu-Kα radiation, shows at least three, preferably at least four, in particular at least 5 or at least 7 or at least 9 or all of the following reflexes, given as 2θ values: 8.0±0.2°, 9.5±0.2°, 10.7±0.2°, 11.0±0.2°, 11.2±0.2°, 11.7±0.2°, 14.2±0.2°, 15.6±0.2°, 16.5±0.2°, 17.7±0.2°, 21.5±0.2°; b) comminuting the coarse particles in the slurry of the compound of formula I, which is at least partially present in its form B, in the presence of the at least one surfactant.
Abstract:
The present invention relates to a method for producing an aqueous suspension concentrate formulation and novel suspension concentrate formulations of the compound of formula I. The method comprises: a) providing an aqueous slurry of coarse particles of the compound of the formula I, where the compound of the formula I is at least partially present in its crystalline form B, which, in an X-ray powder diffractogram at 25° C. and Cu-Kα radiation, shows at least three, preferably at least four, in particular at least 5 or at least 7 or at least 9 or all of the following reflexes, given as 2θ values: 8.0±0.2°, 9.5±0.2°, 10.7±0.2°, 11.0±0.2°, 11.2±0.2°, 11.7±0.2°, 14.2±0.2°, 15.6±0.2°, 16.5±0.2°, 17.7±0.2°, 21.5±0.2°; b) comminuting the coarse particles in the slurry of the compound of formula I, which is at least partially present in its form B, in the presence of the at least one surfactant.