I have never had my coagulation checked when traveling, and get in "trouble" with
my cardiologist because I sometimes let the test slip to two months. I have a rather good experience with
anti-coagulant, part due to my rather consistent diet. That's not to say I eat the same things, but I try to eat similar amounts of salad and green
vegetables known to have a lot of vitamin "K".
Then too there are signs to watch for, bruises and bleeding when brushing teeth come to mind.