When elderly people take benzodiazepines for anxiety and insomnia, their risk of dementia increases by 50%. One was a 90 year old woman who was prescribed xanax a few years . When you see an elderly patient tied to a hospital bed, moaning and. You may become particularly sleepy if Xanax is taken with other drugs that cause drowsiness, or if you're elderly or debilitated. Xanax may be.