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This drug should not be used with the following medications because very serious interactions may occur: febuxostat, past or present use of alkylating-type cancer drugs (e.g., chlorambucil, cyclophosphamide, melphalan), mercaptopurine, natalizumab.

If you are currently using or have used any of these medications listed above, tell your doctor or pharmacist before starting azathioprine.

Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: ACE inhibitors (e.g., benazepril, lisinopril), allopurinol, aminosalicylates (e.g., olsalazine, sulfasalazine), "blood thinners" (e.g., enoxaparin, heparin, warfarin), drugs affecting the bone marrow (e.g., trimethoprim/sulfamethoxazole, cancer chemotherapy drugs).

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.

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. Canadian residents should call their local poison control center directly.

NOTES: Do not share this medication with others.

Laboratory and/or medical tests (e.g., complete blood count, liver and kidney function) should be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.

If you have had an organ transplant, it is recommended that you attend a transplant education class or support group. Learn the signs of organ rejection such as a feeling of being ill, fever, or tenderness around the transplanted organ. Signs of a failing kidney transplant include a decrease in the amount of urine, swelling of the arms/legs/face, trouble breathing, or increase in blood pressure. Seek immediate medical attention if these symptoms occur.

MISSED DOSE: Unless your doctor directs you otherwise, if you take this drug once daily and miss a dose, take it as soon as you remember unless it is almost time for the next dose. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.

If you take more than one dose a day and miss a dose, take it as soon as you remember. If it is almost time for the next dose, take both doses together, then resume your usual dosing schedule. If you miss more than one dose, contact your doctor. You may need to have your dosing schedule adjusted.

STORAGE: Store at room temperature between 59-77 degrees F (15-25 degrees C) away from light and moisture. Do not store in the bathroom. Keep all medicines away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.

MEDICAL ALERT: Your condition can cause complications in a medical emergency. For enrollment information call MedicAlert at 1-800-854-1166 (USA) or 1-800-668-1507 (Canada).

Information last revised April 2011 Copyright(c) 2011 First DataBank, Inc.