Xeljanz Side Effects

Serious Side Effects

Some side effects of Xeljanz are potentially serious and should be reported immediately to your healthcare provider. These include but are not limited to:
  • Signs or symptoms of any type of infection, such as:
    • Fever, sweating, or chills
    • Muscle aches
    • Cough or shortness of breath
    • Bloody phlegm
    • Weight loss
    • Warm, red, or tender sores
    • Diarrhea
    • Abdominal (stomach) pain
    • Burning or frequent urination
    • Fatigue
  • Signs or symptoms of a perforation of the stomach or intestine, such as:
    • Fever
    • Digestive pain that does not go away
    • Unexplained changes in bowel habits
  • Low red blood cells, which can result in anemia
  • Low white blood cells, which can result in infections
  • Increased liver enzymes (found using a blood test)
  • Signs of hepatitis B or C activation (for people who are carriers of these viruses), such as:
    • Yellowing of the whites of the eyes or skin (jaundice)
    • Loss of appetite
    • Vomiting
    • Clay-colored stools
    • Dark urine
  • Signs of an allergic reaction, such as:
    • An unexplained rash
    • Hives
    • Itching
    • Unexplained swelling, especially of the mouth, lips, or throat
    • Wheezing
    • Difficulty breathing or swallowing.

Final Thoughts

You may experience some or none of the Xeljanz side effects listed in this article. Unfortunately, there is no way for your healthcare provider to know beforehand if you will have problems with a medicine that you have never tried.
Therefore, make sure to let your healthcare provider know if you develop any side effects while using Xeljanz or if something "just does not seem right." While it may not be related to the medication, your healthcare provider will be able to diagnose and treat the problem.
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Xeljanz Medication Information

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