Among patients not on blood thinners, about 6 percent had brain bleeds versus approximately 7 percent of patients on warfarin. For INR levels above and below 3.0, ICH rates were similar.

Those within or slightly above the therapeutic range had lower rates, and no brain bleeds occurred in patients with critically high INR levels (above 5).

Those within or slightly above the therapeutic range had lower rates, and no brain bleeds occurred in patients with critically high INR levels (above 5).

TUESDAY, Aug. 5, 2025 (HealthDay News) -- Having a supratherapeutic international normalized ratio (INR) while taking warfarin does not significantly increase the risk for brain bleeding after ...