Any one here get the Shingrix vaccine on Coumadin? My INR was 2.6-3.1 and I got the vaccine a week ago and noticed besides the crappy side effects that my INR has dropped to 2.2 and even after slightly increasing my does still is only 2.3. Still easily in my range, but I like to see my INR at least at 2.5. I have tested 3 times in last week (2 days after each dose change) to see if I can bump it back to 2.5. Yes I understand INR will fluctuate and yes I am very anal, but my diet is extremely consistent, especially around vitamin K. I know Shingrix has some side effects (head aches, flu like symptoms, etc) which my wife and I both experienced for 2-3 days.