better without all that regulation so somebody who's blood thinning is jumping all over the place on coumadin these are much smoother now the disadvantage is that we don't have great tests to monitor how much is in the blood with coumadin we can tell exactly how much is in there with it with the blood tests the newer agents that's a little bit trickier and then there's a little bit of an issue with reversal of these newer agents that coumadin is hard to reverse also but we have medicines with a lot more we have a lot more experience