Warfarin requires a doctor prescription, ask your doctor. My assumption is you'd go back to whatever worked before. Taking Warfarin does require regular blood tests of the clotting factor of your treated blood. I have to do it once a month. That adds to the cost of taking Warfarin.
On the other hand, my cardiologist has made it clear to me these two medications are not interchangeable. I take Warfarin to reduce clot formation, Plavix will not do that for me.
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