The Anonymous Widower

My INR Readings Before And After My Second AstraZeneca Jab

I am on long-term Warfarin after a serious stroke.

I also measure my own INR using a simple hand-held meter.

So with all the fuss about the AstraZeneca vaccine and blood clots, I thought I’d do an experiment around my second dose of the vaccine.

I maintained a constant Warin dose of 3.5 mg, which is the daily dose, I have agreed with my GP.

I maintained a reasonably constant diet. That is fairly easy if you’re coeliac and on a long-term gluten-free diet, as I am.

measured my INR every morning.

These are my results.

  • April 12th – 2.3
  • April 13th – 2.8
  • April 14th – 2.8
  • April 15th – 2.9
  • April 16th – 2.5
  • April 17th – 2.3
  • April 18th – 2.3
  • April 19th – 2.4 – 2nd Jab
  • April 20th – 2.2
  • April 21st – 2.2
  • April 22nd – 2.6
  • April 23rd – 2.5
  • April 24th – 2.4
  • April 25th – 2.7
  • April 26th – 3.0
  • April 27th – 2.7
  • April 28th – 2,5
  • April 29th – 3.0
  • April 30th – 3.1
  • May 1st – 2.9
  • May 2nd – No Data
  • May 3rd – 2.8

It would appear that the results have been less stable since the second jab.

I am a Control Engineer with a B. Eng. from Liverpool University and I’m not surprised at these results.

It’s just like the bounce you get when the wheel of your car hits a pothole.

I would suggest that more research needs to be done.

May 3, 2021 - Posted by | Health | , , , , , , , , ,

2 Comments »

  1. I have been monitoring and logging health data on a long term basis. I like to track
    – average
    – average difference
    – 4 week moving average.

    Using Excel, it is easy to chart these and detect trends which I share with clinical staff.

    Comment by John Robin St.Clair | May 3, 2021 | Reply

  2. I’ve been testing myself for six years and have all the data along with weight, blood pressure, alcohol consumed and similar data to you.

    I’ve also found that during lockdown, the INR bounces like Tigger!

    Comment by AnonW | May 3, 2021 | Reply


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