This disclosure relates to treating or preventing cancers, such as hematological malignancies, by administering a compound that binds BCL2 and one or more compounds that inhibit glucose or glutamine metabolism. In certain embodiments, the compounds that inhibit glucose metabolism are ritonavir optionally in combination with 6-diazo-5-oxo-L-norleucine or any derivative, prodrugs, or salts of these compounds. Contemplated BCL2 binding compounds are ABT-199 (venetoclax), ABT-263 (navitoclax), or ABT-737.