I too am on warfarin for life. I was diagnoised with lupus anti coagulant after they found a clot in my right leg. I was having no symptoms in my leg ,went to the er for hurting in my chest and left arm. was started on lovenox shots 2 times a day and coumadin. I too am experiencing joint and muscle aches and dizziness and feel extremely tired all the time. But I thank God every day they found my clot before it moved. And that they found the clotting disorder. I hope you all get better soon .. God bless you all. P.S. This medicine scares me very much, But so does the alternative!!!!!