and while you are taking xeljanz. tell your doctor if you have been to a region where certain fungal infections are common and if you have had tb, hepatitis b or c, or are prone to infections. tell your doctor about all the medicines you take, and if you are pregnant, or plan to be. taken twice daily, xeljanz can reduce the joint pain and swelling of moderate to severe ra, even without methotrexate. ask if xeljanz is right for you.