New to the group and I'm at a loss. Had two PE in my right lung..been on Warfarin since 2011. My INR has never been in the 2.0-3.0 range. At this point it's has been 1.2-1.4, the lowest .7, they took me off and started me on the Lovenox shots daily 120mg. What could be causing the warfarin to no longer work. I hate giving myself the shots.