Even in Elderly, Suggested Target INR Should Be 2.5

"Even for those older than 85 years, the target international normalized ratio (INR) for patients anticoagulated with warfarin for atrial fibrillation should be 2.5, according to the results of a case-control study published in the Nov. 16 issue of the Annals of Internal Medicine. The risks of intracranial hemorrhage (ICH) were not reduced with low-dose warfarin in this age group."