capox capox capox (also called xelox) is a chemotherapy regimen consisting of capecitabine (trade name xeloda) combined with oxaliplatin. pre- and post-chemotherapy images of a t3 n1 m0 cstage iiia colorectal cancer. four courses of capox therapy. xelox regime operates in 3-week cycles, usually with 8 cycles in total; xeloda is orally taken for twice daily for two weeks, while oxaliplatin is administrated by iv on the first day of the cycle; there is a one-week rest period before the next cycle. adverse effects neuropathy diarrhea