HMM: Dementia risk increased with use of blood-thinning drugs. “A new study reviewing medical data from 6,000 patients reports that individuals with atrial fibrillation who take anticoagulants are at higher risk of dementia than patients who take the blood-thinning drugs for other reasons. . . . The authors conclude that taking warfarin is associated with an increased risk of dementia in all patients, but more so in AF patients.”