Some foods and medicines can affect how imatinib works. Tell your doctor if you are using any of the following: Alfentanil, atazanavir, carbamazepine, clarithromycin, cyclosporine, dexamethasone, dihydroergotamine, ergotamine, erythromycin, fentanyl, fosphenytoin, indinavir, itraconazole, ketoconazole, nefazodone, nelfinavir, oxcarbazepine, phenobarbital, phenytoin, pimozide, primidone, quinidine, rifabutin, rifampin, rifampicin, ritonavir, saquinavir, simvastatin, sirolimus, St John's wort, tacrolimus, telithromycin, warfarin, or voriconazoleBlood pressure medicineIron supplementsStatin medicines