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What is XELJANZ?

XELJANZ (tofacitinib) is a prescription medicine called a Janus kinase (JAK) inhibitor used to treat:

  • Adults with moderately to severely active ulcerative colitis when medicines called tumor necrosis factor (TNF) blockers did not work well or cannot be tolerated

It is not known if XELJANZ is safe and effective in children or in people with Hepatitis B or C.

XELJANZ is not recommended for people with severe liver problems.

Before taking XELJANZ, tell your healthcare provider about all of your medical conditions, including if you:

  • have an infection
  • have had blood clots in the veins of your legs, arms, or lungs, or clots in the arteries in the past.
  • have liver problems
  • have kidney problems
  • have any stomach area (abdominal) pain or been diagnosed with diverticulitis or ulcers in your stomach or intestines
  • have had a reaction to tofacitinib or any of the ingredients in XELJANZ
  • have recently received or are scheduled to receive a vaccine. People taking XELJANZ should not receive live vaccines but can receive non-live vaccines
  • plan to become pregnant or are pregnant. XELJANZ may affect the ability of females to get pregnant. It is not known if this will change after stopping XELJANZ. It is not known if XELJANZ will harm an unborn baby.
    • Pregnancy Registry: Pfizer has a registry for pregnant women who take XELJANZ. The purpose of this registry is to check the health of the pregnant mother and her baby. If you are pregnant or become pregnant while taking XELJANZ, talk to your healthcare provider about how you can join this pregnancy registry or you may contact the registry at 1-877-311-8972 to enroll
  • plan to breastfeed or are breastfeeding. You and your healthcare provider should decide if you will take XELJANZ or breastfeed. You should not do both. After you stop your treatment with XELJANZ, do not start breastfeeding again until 18 hours after your last dose of XELJANZ.
  • Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Especially tell your healthcare provider about any other medicines you take to treat your ulcerative colitis. You should not take tocilizumab (Actemra®), etanercept (Enbrel®), adalimumab (Humira®), infliximab (Remicade®), rituximab (Rituxan®), abatacept (Orencia®), anakinra (Kineret®), certolizumab (Cimzia®), golimumab (Simponi®), ustekinumab (Stelara®), secukinumab (Cosentyx®), vedolizumab (Entyvio®), azathioprine, cyclosporine, or other immunosuppressive drugs while you are taking XELJANZ. Taking XELJANZ with these medicines may increase your risk of infection.
  • Tell your healthcare provider if you are taking medicines that affect the way certain liver enzymes work. Ask your healthcare provider if you are not sure if your medicine is one of these.


  • Take XELJANZ 2 times a day with or without food.
  • Do not take XELJANZ XR for ulcerative colitis.