A few years ago I had pulmonary embolisms treated with TPA successfully, stemming from a blood clot in my leg. Subsequently, I had a hysterectomy and my doctor inserted a filter just before the surgery to avoid complications...success. Recently, because of a random nosebleed, I discovered that since my Coumadin was changed last year to Warfarin, I may have been dealing with side effects...the most serious one being a low Hg...5.2 for no reason...hospitalized for a week...all tests...no internal bleeding...transfusions, iron infusion. This shows up as a side effect in some reading I have done. Since, I have the filter do you think I need a blood thinner or can I do without and not deal with these issues? Thanks.