Also see the Warnings section.
Before using this medication, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
This medication should not be used if you have certain medical conditions. Before using this medicine, consult the doctor or pharmacist if you have: previous severe allergic reaction to this medication, certain metabolic conditions (e.g., G6PD deficiency), previous red blood cell damage (e.g., hemolysis, methemoglobinemia) with this medication.
Before using this medication, tell the doctor the medical history, especially of: kidney disease, dehydration.
Caution is advised when using this drug in children less than 2 years old because they may be more sensitive to the side effects of the drug.
This medication should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor.
It is not known whether this drug passes into breast milk. Breast-feeding is not recommended while using this drug.
Your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with them first.
Tell the doctor of all prescription and nonprescription medication you may use, especially: allopurinol.
This medication can interfere with the uric acid in the blood sample tubes when the tubes remain at room temperature, therefore leading to falsely low uric acid results. Laboratory personnel must follow special procedures to process the blood sample.
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.