Tell your doctor about all your other medicines, especially:
nefazodone;
phenytoin;
an antibiotic--clarithromycin, erythromycin, telithromycin;
antifungal medicine--itraconazole, ketoconazole, posaconazole, voriconazole; or
antiviral medicine to treat HIV or hepatitis C--boceprevir, cobicistat, dasabuvir, elvitegravir, indinavir, lopinavir/ritonavir, nelfinavir, ombitasvir, paritaprevir saquinavir, telaprevir, tipranavir.
This list is not complete. Other drugs may affect vincristine, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.
 Vincristine drug interactions (more detail)
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