Warfarin INR has decreased to 1.4.

Recent decrease in INR despite two dose adjustments it's gotten even lower. What could cause this?

[daisyd]

Lots of people's INR change for different reasons, hope you are being covered with Clexane / heparin while it is so low if not I would speak to a doctor as soon as possible

[Barnacle4bill]

Have a look at what you are eating as many foods will lower the INR eg keep of cranberry and don't have too much greens etc. I self test and know I have to increase my warfarin when I do eat the "wrong things". I am on about 9mg a day to maintain 2.5 to 3.5 but when I started it was more like 7mg.

Interestingly I was 5.3 today and apparently as I am antibiotics at the moment that's caused it to shoot up. Have been told to miss two days then go back to 9mg.

[jackdaw50]

I've had a period of about 3 months when my INR has changed after being on the same Warfarin dose for about 2 years. My target is between 2-3. The highest was 3.3 and the lowest 1.7. No apparent reason. What you need to be sure of is that you have more regular blood tests, mine were weekly, where my dose was changed to achieve my target. My INR is now 2.7 and my tests are every 2 weeks.

[trevorb]

I have been taking warfarin since Sept 13 and have long periods of stability along with some significant changes with no apparent reasons. Regular checking helps but I have learnt not to change the dose too quickly otherwise you are constantly chasing it. Along with weekly readings I keep a record of the average over the month and this is a good indicator.

[Svtcrazy]

I have been on Warfarin for years. Sometimes your body builds up a tolerance to it or you get a bad batch. Look at what you are drinking , eating, and also are you taking any other medications that you don't normally take - cold meds, etc. Each body reacts differently. Ask your questions, is this a new batch of pills, did I take them at a different time of day, am I stressed, am I drinking more fluid than normal, etc.

Mist of all don't stress about, it will work out. If you and you doctor have good communication, you will do fine.