Will Adding Sulfasalazine To Xeljanz Help With My Morning Finger Swelling And Stiffness?

Hi Doctors I am taking Xeljanz 11mg every days since April till now but every morning when I woke up my fingers are swollen & pain/or stiff and its on and off so my Doctors recommend me to take Sulfasalazine 500mg twice a day with Xeljanz, and I stopped prednisone a month ago, so my question is if I start taking new Sulfasalazine do you think it will help? thank you