Hello everyone, I've been on warfarin ever since my dignosis in 1999 but have recently had a baby so was on clexane jabs. I've been back on warfarin since may but I have not yet got back into my range of 2.5 - 3.5 (target 3), my INR is currently 2.2 a drop from 2.4 2 weeks ago. The warfarin clinic at my hospital seem to be reluctant to increase my warfarin past 12 mg per day as I've never been on more than that. Is it possible to build up a resistance to this drug. And has anyone else been through similar? Thanks kate xxx
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