The last time I was in Boston, I picked up a rental car at the airport and at the end of 1 hour I had driven 3.1 miles. No wonder they drive like maniacs when thr road opens up.
Weren't you the one who had a problem with Fiorinal and fluctuating warfarin doses? I assume that you are avoiding this combination. But as Gina wrote, you should be looking at all of your other meds too. There could be something interacting especially something that you only take on an as needed basis.
When I get complaints like this, the most common thing that is happening is that the person is testing too often and changing the warfarin dose too often. Remember that it takes about three days for the warfarin to take effect. So, if you tested on Friday and changed the dose and then tested again on Monday, you may not have seen any effect of the warfarin dose change on Friday yet. So then if you change the dose on Monday -- you get to be like a puppy chasing its tail. Many, many doctors do not understand this time lag of warfarin.
What I would like to see you do is to figure the dose that you took over the past 7 days. See how that compares to the last dose that put your INR in range. Then add about 10% to 15% to that amount. Then take this dose for 7 days and see what happens. You are almost always better off with an INR that is slightly high rather than one that is low. I know that it takes a lep of faith to not test for 7 days but I'm fairly sure that you are changing the dose too often.
Try this before having your husband take a day off and joining the maniacs!!
As for the Lovenox. Most of us who work with warfarin full-time think that Lovenox is still the best choice for people with valves. I have written about evidence-based medicine and it seems that someone at the FDA is guilty of not practicing what they preach. There were two pregnant women in Africa who were placed on Lovenox. The dose is supposed to be adjusted by weight but they did not do this as they gained during their pregnancy. They died. As a result, the FDA decided than nobody with a valve in the USA should get Lovenox, pregnant or not. This does not follow the tenets of good evidence-based medicine.
Several of us had dinner with a medical school professor earlier this month and discussed the issue. She said that she is confident the Lovenox is the best choice but now that the package insert says that it is not to be used in people with valves the medical group's attorneys say, There is no way in (you know where) that you are going to prescribe Lovenox to anybody with a valve. As she sees it, this is now a legal issue not an issue of good medical practice.
Our national organization is trying to get somebody from the FDA to speak at our meeting in May to explain their thinking and ask them to reconsider. I hope that they changes the package insert long before May, but who knows.