"
Specifically, researchers found, patients on the clot-preventing drug warfarin showed a higher dementia risk if their blood levels of the medication were frequently too high or too low.
And that was true not only for people with atrial fibrillation, but also for those using warfarin for other reasons...."
http://www.cbsnews.com/news/popular-afib-heart-drug-warfarin-linked-to-dementia-risk/
Vk