Sewingsuz......I am so sorry to hear you have been sick and had the blood clot. I just wanted to tell you that my dad ALSO had and gets blood clots. This is going to sound really weird to you...but...they thought he was allergic to the Coumadin also...come to find out it WASNT THE ACTUAL coumadin it was the DYE and he was able to get Coumidin with no dye...talk to your doctor. ITS WORTH asking about. I wish you all the best. ;)