Just a note.
Was due for monthly INR yesterday, normally fairly stable in 2-3 range.
But had had a sudden unexplained severe diarrhea event over previous 36 hours, big fluid loss.
INR came in at 4.2, so I asked for another to be done, that came in at 3.6.
Googling the issue came up with many reports about high INR after bouts of diarrhea.
Diarrhea now appears to have gone (2 days only)
Typically over New year all labs closed, but have reduced warfarin today to 50% , then back to normal intake and next check is on Monday next, assuming rehydration should take level down to normal level.
What does anyone think?