Do not take this medication if your child is allergic to Mercaptopurine.

Do not give your child any other medications or herbal products without consulting your doctor or pharmacist. Some medication or food may reduce Mercaptopurine efficacy, or increase incidence of side effects. These include:

• Blood thinning medications such as Warfarin
• Allopurinol
• Sulfasalazine, Mesalazine
• Live vaccines, such as BCG, MMR and some forms of polio or influenza vaccines

Disclaimer: The list is not exhaustive. When in doubt, please consult the doctor or pharmacist.