Why does INR go up when I have diarrhea? In 2010, I had diarrhea due to an antibiotic, and INR rose. In this January again, when I had a possible norovirus infection (Jan 13-15), my INR rose from previous 2.5 (Jan 10) to 3.3 (Jan 17). It is measured once per week.
On January 6, when I got atrial fibrillation, My Na+ was 146 (upper limit of normal 144). Am I almost always dehydrated, because my sodium is often high? I have sometimes polyuria. I drank water and special drinks during the diarrhea to prevent dehydration. Could I still be dehydrated, after the diarhhea when INR was measured to be 3.3? On Jan 18 I had to be without warfarin and then continued taking it. I am 65 yars old, and waiting for cardioversion.