DRUG INTERACTIONS: Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.Some products that may interact with this drug include: digoxin, phenytoin, drugs that may cause nerve damage to the ear (e.g., chemotherapy drugs that contain platinum), drugs affecting liver enzymes that remove vincristine from your body (such as aprepitant, cimetidine, St. John's wort, azole antifungals including itraconazole, macrolide antibiotics including erythromycin, rifamycins including rifabutin, certain anti-seizure medicines including carbamazepine), drugs that may cause difficult urination (e.g., belladonna alkaloids, anticholinergic drugs such as atropine, antispasmodics such as dicyclomine, drugs to treat an overactive bladder such as oxybutynin).

OVERDOSE: If overdose is suspected, contact your local poison control center or emergency room immediately. US residents can call the US National Poison Hotline at 1-800-222-1222. Canada residents can call a provincial poison control center.

NOTES: Laboratory and/or medical tests (e.g., complete blood count, uric acid blood levels) should be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.

Report Problems to the Food and Drug Administration You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088. Need help identifying pills and medications? Use the pill identifier tool on RxList.