AZATHIOPRINE suppresses the immune system. It is used to prevent organ rejection after a transplant. It is also used to treat rheumatoid arthritis.

They need to know if you have any of these conditions:

• infection
• kidney disease
• liver disease
• an unusual or allergic reaction to azathioprine, other medicines, lactose, foods, dyes, or preservatives
• pregnant or trying to get pregnant
• breast feeding

Take this medicine by mouth with a full glass of water. Take your medicine at regular intervals. Do not take your medicine more often than directed. Continue to take your medicine even if you feel better. Do not stop taking except on your doctor's advice.

Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.

NOTE: This medicine is only for you. Do not share this medicine with others.

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

Do not take this medicine with the following:

• mercaptopurine

This medicine may also interact with the following medications:

• allopurinol
• aminosalicylates like sulfasalazine, mesalamine, balsalazide, and olsalazine
• leflunomide
• medicines called ACE inhibitors like benazepril, captopril, enalapril, fosinopril, quinapril, lisinopril, ramipril, and trandolapril
• mycophenolate
• sulfamethoxazole; trimethoprim
• vaccines
• warfarin

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

Visit your doctor or health care professional for regular checks on your progress. You will need frequent blood checks during the first few months you are receiving the medicine.

If you get a cold or other infection while receiving this medicine, call your doctor or health care professional. Do not treat yourself. The medicine may increase your risk of getting an infection.

Women should inform their doctor if they wish to become pregnant or think they might be pregnant. There is a potential for serious side effects to an unborn child. Talk to your health care professional or pharmacist for more information.

Men may have a reduced sperm count while they are taking this medicine. Talk to your health care professional for more information.

This medicine may increase your risk of getting certain kinds of cancer. Talk to your doctor about healthy lifestyle choices, important screenings, and your risk.

Side effects that you should report to your doctor or health care professional as soon as possible:

• allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
• fever, chills, or any other sign of infection
• severe stomach pain
• unusual bleeding, bruising
• unusually weak or tired
• vomiting
• yellowing of the eyes or skin

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

• hair loss
• nausea

This list may not describe all possible side effects.

Keep out of the reach of children.

Store at room temperature between 15 and 25 degrees C (59 and 77 degrees F). Protect from light. Throw away any unused medicine after the expiration date.