Voice of America | Common Drugs Linked to Increased Risk of Dementia, Alzheimer's Voice of America A new study by U.S. researchers has found that common, over-the-counter drugs - including those to promote sleep and treat allergies - may increase the risk of dementia and Alzheimer's disease among people 65 and older. The drugs are called ... Over-the-counter sleep aids linked to dementia Study suggests sleeping drugs can increase risk of Alzheimer's Common Sleep and Allergy Medications Linked to Dementia, Alzheimer's |