Freddie -- not exactly. But Vitamin K helps mediate the clotting effects, and the more Vitamin K you eat, the lower your INR will be. (The clotting mechanics are more complex than just stating that vitamin K causes clotting and warfarin undoes it -- but the basic statement that Vitamin K lowers INR and Warfarin raises it is pretty much all most people need to know about it).
Al's right -- entirely avoiding Vitamin K is NOT a good idea. In addition to making it easier to control INR if we take a consistent amount daily, Vitamin K provides other benefits to our bodies that we don't get without it.
Taro is one of the manufacturers of generic coumadin/warfarin. If I recall, Taro comes from Israel. The thing about generics is that they are supposed to have a biologically identical effect to that of the patented drug (Coumadin). You should be able to substitute the same dose of a generic for the Coumadin and have the same effect. Even if the generic is made in another country, it's probably not right to assume that the effects would be different.
In my case, I've used generics from a few different vendors. Because I had the convenience of a meter, and because I didn't initially trust the generics, I tested after switching and found that, in my case, the generics DID have an equivalent effect on my INR (in other words, it stayed about the same as it was with coumadin or generic from another manufacturer).
As far as cost -- in most States you can get generic warfarin for about $10 for 90 pills. (These prices are for purchases in the U.S. from some pharmacies that sell discount generic warfarin - I've been told that the prices in Canada may be higher. I sometimes buy generic warfarin from an Indian pharmacy that I use, and it's inexpensive and biologically identical to the generic I buy from my local pharmacy, according to my INR testing) The last time I bought coumadin, it was about a buck a pill. BIG difference. (In some states - like California, where I live - 5 mg generics are much more expensive because of some state requirements relating to doses that the state insurance covers -- if I didn't have another source of 5 mg warfarin, I would just buy the 10 mg and break them in half)
