I know many people on coumadin for different reasons such as stroke, blood clots in the legs, bleeding disorders that make their blood too thick which predisposes them to strokes
and clot formation, etc. They have to check their PT/
INR levels fairly frequently because of the variability of this med and adjust the dosage accordingly. I can understand why Hep C would have PT/INR values due to the clotting problems that liver disease causes.