Older people who have relied on a class of drugs called benzodiazepines to reduce anxiety or induce sleep are at higher risk of going on to develop Alzheimer’s disease, new research finds, with those whose use of the medications is most intensive almost twice as likely to develop the mind-robbing disorder.

Benzodiazepines – marketed under such names as Xanax, Valium, Ativan and Klonopin – are widely used to treat insomnia, agitation and anxiety, all of which can be early signs of impending Alzheimer’s disease in the elderly. But the current study sought to disentangle benzodiazepines’ use in treating early dementia symptoms, probing instead the possibility that heavy use of the medications may permit, cause or hasten the onset of Alzheimer’s dementia.

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