My husband has a DVT and it's levels need to be between 2.0 and 3.0!
Normal PT/INR is 0.8 - 1.2. If you're on a blood thinner like warfarin for some reason, they may aim for 2.0 - 3.0. In some cases where clotting is a real problem they may push it up to 2.5 to 3.5. Does that help? Do you have a heart or clotting disorder? Work with your doctor on that. They can control it but you'd have to be monitored regularly.