Anxiety and Dementia Risk: What the Research Says and How to Act

If you or someone you care for lives with anxiety, you may worry about its long-term effects on brain health. Recent research has found that new or chronic anxiety can be linked to a higher risk of developing dementia later in life. But here is the hopeful news: when anxiety is identified and treated, that increased risk appears to go away, bringing the risk back down to the level of someone who never had anxiety. This means that addressing anxiety is not just about feeling better today—it is a powerful step you can take to protect cognitive health for the future. You are not alone, and there are concrete, practical steps you can start using right now.

Key points

• New or chronic anxiety is linked to a more than sevenfold increase in dementia risk, but treating anxiety appears to erase that extra risk.
• Treating anxiety is not just about feeling better—it may be a brain-health strategy that protects against cognitive decline.
• For someone already in early-stage dementia, anxiety can worsen symptoms and create a vicious cycle; treating it improves quality of life and may slow decline.
• Effective anxiety treatment includes therapy, medication, lifestyle changes (routine, exercise, social connection), and grounding techniques.
• Caregivers must also manage their own anxiety—your calm presence is a powerful tool for the person you care for.
• Always discuss anxiety treatment with a clinician, especially when dementia is present, to ensure safety and effectiveness.

What the Research Shows About Anxiety and Dementia Risk

A groundbreaking study followed people over 13 years and found that those who developed new or chronic anxiety were more than seven times as likely to develop dementia compared to people without anxiety. That sounds alarming, but the same study found a remarkable silver lining: for people whose anxiety was identified and treated, their dementia risk returned to normal—the same as someone who had never experienced anxiety. This means that treating anxiety may effectively erase the extra risk. It is important to understand that this is a link, not a proven cause—other factors could be at play—but the connection is strong enough that researchers are now working to replicate these findings. For caregivers and early-stage patients, this is a clear signal: managing anxiety is not just about comfort; it may be a brain-health strategy.

Why Anxiety May Increase Dementia Risk

Anxiety affects the brain in several ways that may contribute to cognitive decline over time. Chronic anxiety keeps the body in a state of high stress, which can damage blood vessels and reduce blood flow to the brain. The brain uses about 20 percent of the body's oxygen supply, so anything that restricts oxygen-rich blood—like the effects of prolonged anxiety—can harm brain cells. Additionally, anxiety often leads to poor sleep, reduced social engagement, and unhealthy coping behaviors (like overeating or avoiding exercise), all of which are known risk factors for dementia. For people already in early-stage dementia, anxiety can also worsen existing symptoms, making confusion and memory problems feel more intense. The good news is that by treating anxiety, you may be able to interrupt this cycle before it causes lasting damage.

Anxiety in Early-Stage Dementia: A Two-Way Street

For someone already diagnosed with early-stage dementia, anxiety can arise as a natural response to the changes they are experiencing. They may feel their world shifting, notice memory lapses, and worry about what the future holds. This can lead to feelings of worthlessness, guilt, and even suicidal thoughts—which are more common in dementia than many realize. At the same time, untreated anxiety can make dementia symptoms worse, creating a vicious cycle. The person may become more withdrawn, less willing to try new things, and more dependent on caregivers. Recognizing this two-way relationship is key: treating anxiety can improve quality of life today and may also slow cognitive decline. For caregivers, this means that addressing your loved one's anxiety is not 'just' emotional support—it is a medical priority.

General caregiving information, not medical advice. Check medications and major care changes with your clinician.

Discuss with your clinician

Ask your doctor: 'Based on this new research, should I or my loved one be screened for anxiety as part of our dementia risk assessment?'

Ask your doctor: 'What are the safest medication options for treating anxiety in someone with early-stage dementia? Are there any that could worsen cognitive symptoms?'

Ask your doctor: 'If we start treatment for anxiety, how will we know if it is working? How long should we try before adjusting?'

Ask your doctor: 'Are there any interactions between current dementia medications and common anxiety treatments (like SSRIs or benzodiazepines)?'

Ask your doctor: 'Should we consider a referral to a geriatric psychiatrist or a neuropsychologist for specialized anxiety treatment?'

Ask your doctor: 'What is the best way to monitor for suicidal thoughts in someone with early-stage dementia who also has anxiety?'

Related guides

• Does chronic insomnia raise dementia risk?
• Managing pre-sleep agitation, hollering, and swearing in dementia
• Lifestyle steps to protect brain health from dementia
• Caregiving techniques for attention deficits in dementia
• caregiver stress and the caregiver's own dementia risk
• Alprazolam (Xanax) Safety and Administration for Dementia Caregivers
• The Lifeline of Connection: Why Social Ties Matter for Healthy Aging and Mental Well-Being
• Redirection technique for agitation
• Building a medication routine for a person with dementia

Sources

• NICE
• PMC
• Alzheimer's Association
• Am Psychiatric Assoc
• Mayo Clinic
• aaic.alz.org
• All Home Care Matters
• Dementia Careblazers
• Answers About Alzheimer's
• Dementia Caregiver Support For Christians
• AlzOrangeCounty
• Hospice Nurse Julie