I thought I read somewhere that the circulation problems with DVT or any venous insufficiency related to the DVT could cause that terrible, all the time cold feeling. I will probably burn out my space heater this year. I can never get warm enough! It's very frustrating although I saved money on A/C this past summer. I am sure the Coumadin has something to do with it since it has 6 gazillion potential side effects but I am not sure how much. I know losing weight makes me freeze too so if you have lost any weight recently it could cause that feeling and I think that just being run down after being chronically not healthy can do it too, I would ask my Dr, if there are any vitamins that you need more off but obviously also ask him how much K is alright at this point. I was wondering if anyone is taking a vitamin who is still on warfarin/coumadin? If so, what did your Dr. tell you to do? It is 52 degrees here today and rainy/foggy, just warm enough that the heat is not kicking on that much and I feel so cold. I have been cleaning my oven more often on the auto cycle cause it really heats the house up. Take care of yourself!

I took a multivitamin and a separate Vitamin E the whole time I was on coumadin. I had been taking it previously (and still do) and he didn't see a reason to quit.
I always had cold hands and feet before my clot, and that didn't change being on or off coumadin. Being mobile is hard, I know, but the more you move, the better your circulation and metabolism will be and will help with the chills. Might want to try some low-impact water aerobics?
I will add that I've been diagnosed with hypothyroidism in the last few months, and my meds have whacked my thyroid back into place and I don't have cold extremities anymore.