What should I watch for?
You may need blood work done while you are taking this medicine.
Call your doctor or health care professional for advice if you get a fever, chills or sore throat, or other symptoms of a cold or flu. Do not treat yourself. This drug decreases your body's ability to fight infections. Try to avoid being around people who are sick.
This medicine may increase your risk to bruise or bleed. Call your doctor or health care professional if you notice any unusual bleeding.
In some patients, this medicine may cause a serious brain infection that may cause death. If you have any problems seeing, thinking, speaking, walking, or standing, tell your doctor right away. If you cannot reach your doctor, urgently seek other source of medical care.
Talk to your doctor about your risk of cancer. You may be more at risk for certain types of cancers if you take this medicine.
Do not breast-feed an infant while taking this medicine or for at least 2 weeks after stopping it.
Common and Rare Side Effects
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Black, tarry stools
blood in the urine or stools
collection of blood under the skin
deep, dark purple bruise
difficult, burning, or painful urination
frequent urge to urinate
large, flat, blue or purplish patches in the skin
lower back or side pain
painful or difficult urination
pinpoint red spots on the skin
pus in the urine
shortness of breath
small, red or purple spots on the skin
troubled breathing with exertion
ulcers, sores, or white spots in the mouth
unusual bleeding or bruising
unusual tiredness or weakness
Painful blisters on the trunk of the body
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.