A Phase II Study of Gleevec and Arsenic Trioxide in Patients With CML Who Fail Gleevec

Pts. who fit the inclusion criteria, \& were on imatinib, 400 mg/day, will be treated with a month of imatinib at 800 mg/d in divided doses (400mg bid) \& then started on arsenic trioxide. Pts. already on imatinib 800 mg/day may be started on arsenic trioxide. Pts. unable to tolerate 800 mg/d should be treated at the max. dose tolerated above 400 mg/d. A total of 16 weeks of arsenic trioxide treatment will be administered (15 weeks of maintenance). Pts. are to continue on imatinib 800 mg/day,(or the max. tolerated dose) while receiving the arsenic trioxide. If a pt. has been taken off the arsenic trioxide, they should be continued on gleevec 800 mg per day (or the maximum tolerated dose) until there is evidence of progression of disease.