The time of onset of ulcerative colitis was from one day after IFN initiation to one week after discontinuation of the therapy.26 Celiac disease was reported in a 36-year old woman with RRMS after one month of treatment with IFN-β1b.27 MS concomitant with celiac disease has been recently diagnosed more often than expected.27 A 27-year-old woman with RRMS treated with GA for 2 years presented with abdominal pain, diarrhea, fever, and weight loss. Here, IFNA1 is linked to ulcerative colitis.