Keep both sizes on hand, including the 15 ounce and 28 ounce cans. But Medicare said there was little evidence that use of the genetic test led to better outcomes for patients compared with the existing procedure, in which doctors estimate an initial dose based on patient age, weight and other factors. Ask your healthcare provider what dose you should take that day, and each day until you have your next blood test. Even with the symptoms and the Dr telling me that have these things still wonder if have Lupus or if the tests and Dr are wrong. Any doctor, coumadin tablettia dentist, or emergency medical care provider who treats you should know that you are taking Coumadin.