It is very important that your doctor check your progress at regular visits to make sure that this medicine is working properly. Blood tests may be needed to check for unwanted effects.
Do not use azathioprine (Azasan®, Imuran®) or mercaptopurine (Purinethol®) while you are taking this medicine. Using these medicines together can cause serious medical problems.
This medicine may increase your risk of having serious heart and blood vessel problems such as heart attack or stroke. Check with your doctor right away if start having chest pain, trouble with breathing, sudden or severe headache, or problems with vision, speech, or walking.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.