Your healthcare professionals (such as your doctor or pharmacist) may already be aware of any possible drug interactions and may be monitoring you for it. Do not start, stop or change the dosage of any medicine before checking with them first.
This product should not be used with the following medications because very serious interactions may occur: altretamine, cisplatin, levodopa (when used without carbidopa).
If you are currently using any of these medications, tell your doctor or pharmacist before starting this medication.
Before using this product, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: folic acid antagonists (e.g., methotrexate), hydantoins (e.g., phenytoin, diphenylhydantoin), pyrimethamine, other vitamin/nutritional supplements.
This product can affect the results of certain lab tests (e.g., intrinsic factor antibodies, certain urobilinogen tests). Make sure laboratory personnel and your doctors know you use this drug.
This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.