Disclosed herein is a method for the prevention, delay of progression or treatment of cancer in a subject, comprising administering to the subject in need thereof a PARP inhibitor, particularly, (R) -2-fluoro-10a-methyl-7, 8, 9, 10, 10a, 11-hexahydro-5, 6, 7a, 11-tetraazacyclohepta [def] cyclopenta [a] fluoren-4 (5H) -one, a sesqui-hydrate thereof, or a pharmaceutically acceptable salt thereof, in combination with temozolomide and/or radiation therapy. Also, disclosed a pharmaceutical combination comprising a PARP inhibitor, particularly, (R) -2-fluoro-10a-methyl-7, 8, 9, 10, 10a, 11-hexahydro-5, 6, 7a, 11-tetraazacyclohepta [def] cyclopenta [a] fluoren-4 (5H) -one, a sesqui-hydrate thereof, or a pharmaceutically acceptable salt thereof, in combination with temozolomide and the use thereof.
