Patients receiving treatment with St. John's wort or Phenytoin. Strong inhibitors (eg, ketoconazole) or inducers (eg, rifampicin or St. John's Wort) of CYPA (within weeks prior to the start of dosing in the study) Patients must also avoid St. Johns Wort, an inducer of CYPA Patients must be willing to not take St. John wort or grapefruit juice while participating in this trial and should avoid drugs that are strong inducers of P-gp, and to switch to alternative drugs when available All herbal medicines (eg, St. John's wort), vitamins, and supplements consumed by the subject within the days prior to receiving the first dose of AMG Use of St. Johns wort =< days prior to registration Concomitant use of strong cytochrome (CYP) inducers or inhibitors including nutraceutical preparations, e.g., grapefruit juice and St Johns wort Patient must not be taking Rifampin or St John`s wort. Subjects taking herbal supplements (St. John's Wort, gingko biloba, etc.) should discontinue these supplements days prior to study registration. Subjects being treated concurrently with any prohibited medications, including investigational medication, rifampin, St. John's wort, and potent CYPA inhibitors (excluding ketoconazole) unless continuation of such medications are determined by the investigator to be in the best interest of the patient Use of St. Johns wort or rifampin No concurrent herbal or unconventional therapy (e.g., St. John's wort) Use of St. Johns Wort because of its effects on hepatic drug metabolism Patient agrees to discontinue St. Johns Wort while receiving dasatinib therapy (discontinue St. Johns Wort at least days before starting dasatinib) Patient is not taking St. Johns Wort Concomitant Rifampicin and St John's Wort (Warfarin may be used only with very close monitoring.) All herbal medicines (e.g., St. Johns wort), vitamins, and supplements consumed by the subject within the days prior to receiving the first dose of AMG , and continuing use, if applicable, will be reviewed by the principal investigator Concomitant treatment with rifampin and St. Johns wort Subjects taking medications that are known potent or moderate inducers/ inhibitors of CYPA (including St. John's Wort) St. John's Wort may decrease everolimus exposure unpredictably and should be avoided. All herbal medicines (e.g., St. Johns wort), vitamins, and supplements consumed by the subject within the days prior to receiving the first dose of AMG , and continuing use, if applicable, will be reviewed by the principal investigator Current or recent (=< days prior to randomization) use of sorivudine, brivudine, and St. Johns wort Patients taking herbal supplements (St. Johns Wort, gingko balboa, etc.) should discontinue these supplements two weeks prior to study registration Potent inhibitors or inducers of CYPA within weeks before the first dose of study treatment ( weeks for St John's Wort). Concomitant treatment with rifampin or St. John's Wort; patients should discontinue these drugs at least weeks prior to starting protocol treatment Prohibited treatments and or therapies:\r\n* Category I drugs that are generally accepted to have a risk of causing Torsades de Pointes including: (patients must discontinue drug days prior to starting dasatinib)\r\n** Quinidine, procainamide, disopyramide\r\n** Amiodarone, sotalol, ibutilide, dofetilide\r\n** Erythromycin, clarithromycin\r\n** Chlorpromazine, haloperidol, mesoridazine, thioridazine, pimozide\r\n** Cisapride, bepridil, droperidol, methadone, arsenic, chloroquine, domperidone, halofantrine, levomethadyl, pentamidine, sparfloxacin, lidoflazine\r\n* Patient agrees to discontinue St. Johns wort while receiving dasatinib therapy (discontinue St. Johns wort at least days before starting dasatinib)\r\n* Patient agrees that intravenous (IV) bisphosphonates will be withheld for the first weeks of dasatinib therapy due to risk of hypocalcemia All subjects must agree to stop the use of all herbal medicines (e.g., St. Johns wort), and supplements, within the days prior to receiving the first dose of AMG , and during the protocol AMG treatment (weeks -); subjects may renew the use of the above at week ; standard adult multi-vitamin is allowed Concomitant Medications\r\n* Patient agrees to discontinue St. Johns Wort while receiving dasatinib therapy (discontinue St. Johns Wort at least days before starting dasatinib)\r\n* Patient agrees that IV bisphosphonates will be withheld for the weeks of dasatinib therapy St. Johns Wort Patients taking rifampin and/or St. John's Wort No St John's wort supplement or other herbal supplementation is allowed while on trial; patients are not to take grapefruit juice during study treatment Herbal remedies (e.g., St. John's wort) within week of enrollment Use of St. Johns Wort or rifampin (rifampicin) within the last weeks Use of St. Johns Wort or rifampin (rifampicin) Concomitant use of St. Johns Wort or rifampin (rifampicin) Concomitant use of phenytoin, carbamazepine, rifampicin, barbiturates, or St John's Wort Patients must be willing to discontinue taking dong quai and/or St. Johns wort Has consumed herbs/fruits that may have an influence on pharmacokinetics (PK) of DS-b from days ( days for St. John's wort) prior to the start of the study and throughout the entire study