I am just starting on warfarin. Started at INR 1.1. It has been 6 weeks and they only test me every week but INR values have been 1.1, 1,.2, 1.4 ,1.5,1.6,1.8,1.4. With increasing doses. Now at 7.5 mg per day. My question is: doesn't it seem reasonable that the body has some natural control...