1142143141414A method of treating lymphoblastic leukemia acute myeloid leukemia BCR ABL positive acute lymphoblastic leukemia or CD34 positive acute myeloid leukemia comprising the step of administering to a patient a pharmaceutically acceptable amount of a composition comprising a thienotriazolodiazepine compound according to Formula (1) as a solid dispersion wherein X is a halogen R is C C alkyl R is C C alkyl a is an integer of 1 4 R is C C alkyl C C hydroxyalkyl C C alkoxy phenyl optionally having substituent(s) or heteroaryl optionally having substituent(s) a pharmaceutically acceptable salt thereof or a hydrate thereof and a pharmaceutically acceptable polymer. In one embodiment the pharmaceutically acceptable polymer is HPMCAS.