Medical News Today | Over-the-counter sleep aids linked to dementia Medical News Today A new study has found a significant link between high use of anticholinergic drugs - including popular non-prescription sleep aids and the antihistamine Benadryl (diphenhydramine) - and increased risk of developing dementia and Alzheimer's disease in ... Study suggests sleeping drugs can increase risk of Alzheimer's Common Drugs Linked to Increased Risk of Dementia, Alzheimer's Media dementia scare over hay fever and sleep drugs |