The invention relates to a pharmaceutical dosage form which comprises a solid dispersion product comprising N-(4-(4-((2-(4-chlorophenyl)-5,5-dimethyl-1-cyclohex-1-en-1-yl)methyl)piperazin-1-yl)benzoyl)-4-(((1R)-3-(morpholin-4-yl)-1-((phenylsulfanyl)methyl)propyl)amino)-3-((trifluoromethyl)sulfonyl)benzenesulfonamide or a salt, hydrate or solvate thereof, at least one pharmaceutically acceptable polymer, and at least one pharmaceutically acceptable solubilizer. The invention is further directed to processes for preparing the pharmaceutical dosage form and to use of the dosage form for treating proliferative disorders.