It is very very rare to develop a new PE while on Warfarin, even if your INR dips that low. Mine once dipped to 1.15 and I was ... I will still take warfarin until March just as a precautionary measure. The doc thinks the lung discomfort is part of the ... told to take the clexane (lovenox) injections for a few days while I was given a higher loading does of warfarin again. So if ...