Here is a brief simplified chart of human blood INR Range, showing INR levels, and the factors that affect them.
This chart illustrates typical therapeutic INR levels, while using Coumadin (warfarin) therapy. An INR up to 10 is targeted in hyper-therapeutic situations, where any clotting at all absolutely must be avoided.
Blood INR Ranges
High Risk Group = 3.0 – 4.5
Intense Therapeutic Range = 2.5 – 3.5
Therapeutic INR Range = 2.0 – 3.0
Undefined INR Range = 1.2 – 2.0
Normal Human INR Range = 0.8 – 1.2