 - Patients should not be taking drugs that are generally accepted to have a risk of causing Torsades de Pointes. The following must be discontinued at least 7 days prior to starting dasatinib to be eligible:quinidine, procainamide, disopyramide, amiodarone, sotalol, ibutilide,dofetilide, erythromycins, clarithromycin, chlorpromazine, haloperidol, mesoridazine, thioridazine, pimozide, cisapride, bepridil, droperidol, methadone, arsenic, chloroquine, domperidone, halofantrine,levomethadyl, pentamidine, sparfloxacin, lidoflazine 