13. Pts currently receiving any of the following medications will be excluded: (a) Any concurrent systemic anticancer therapy; (b) Any concurrent investigational agents (c) Category I drugs that are generally accepted to have a risk of causing Torsades de Pointes including: (Pts must discontinue such drugs 7 days or more prior to starting dasatinib):i. quinidine, procainamide, disopyramide;ii. amiodarone, sotalol, ibutilide, dofetilide;iii. erythromycin, clarithromycin;iv. chlorpromazine, haloperidol, mesoridazine, thioridazine, pimozide