Dementia is a decline in cognitive functioning beyond the typical effects of aging. A person’s memory, attention, and ability to use language can all be impacted.
Changes in mood often accompany dementia. Depression can set in as someone starts losing their memories, their ability to socialize, and their capacity to perform daily tasks.
There may also be another link between dementia and depression. Experiencing depression earlier in your life may increase your risk of developing dementia later on.
Keep reading as we dive deeper into the link between depression and dementia.
A 2020 study conducted in Sweden compared dementia risk in people with and without depression. The study found that people with a diagnosis of depression were at a higher risk of developing dementia.
The risk of dementia appeared to be highest in the first year after a diagnosis of depression. After that, the risk decreased rapidly with time. However, it was still elevated more than 20 years after the diagnosis of depression.
One 2020 studyfound that depression in people ages 45 to 64 years old was also associated with a higher risk of dementia.
Researchers involved in a
Both depression and depressive symptoms were found to be associated with an increased risk of dementia in this group. But this study didn’t account for the fact that depression can also be a symptom of dementia.
Researchers found that elevated depressive symptoms in early adulthood (ages 20 to 49), as well as in later life (ages 70 to 89), were associated with cognitive impairment in late life as well as a faster rate of cognitive decline.
The effects of dementia can have a great impact on a person’s mood and emotions as they try to cope with their cognitive changes. This means that depression can also appear as a symptom of dementia.
Depression as a symptom of dementia isn’t uncommon. A 2015 review notes that
Many dementia symptoms also overlap with depression symptoms, including:
- having difficulty with memory and concentration
- feeling depressed, down, or helpless
- losing interest in previously enjoyable activities
- isolating yourself from others
Due to the significant overlap in symptoms, depression can be hard to diagnose in people with dementia.
Treating depression in people with dementia can be complicated. People with dementia often have difficulty remembering things and focusing, which can make talk therapy difficult. But this may benefit some people.
Common antidepressants include:
- selective serotonin reuptake inhibitors (SSRIs)
- serotonin and norepinephrine reuptake inhibitors (SNRIs)
- tricyclic antidepressants (TCAs)
- monoamine oxidase inhibitors (MAOIs)
When doctors do prescribe antidepressants to people with dementia, they need to monitor them closely. This is because it can be difficult to observe the effects of psychiatric medications in people with dementia.
Lifestyle changes can also be difficult for people with dementia, but friends, family, and caregivers can help. Examples of constructive lifestyle changes include:
There’s currently no cure for dementia. But managing this condition can help improve quality of life.
Medications known as acetylcholinesterase inhibitors can slow the progression of dementia, including:
The support of loved ones and caregivers is also essential. Ways you can help include:
- helping to maintain an individual’s independence as long as possible
- helping with daily activities and personal care
- encouraging activities that provide mental and social stimulation
- managing the mood, behavioral, and sleep symptoms associated with dementia
- managing other health conditions and treatments
Whether they’re occurring separately or together, symptoms of dementia and depression need to be evaluated by a healthcare professional. Here are some signs that it’s time to look for care.
Dementia symptoms can vary by individual. They may appear subtle at first, before becoming more noticeable as time passes. Look out for:
- increased forgetfulness, which can include:
- forgetting where you put things
- difficulty recalling events or people’s names
- getting lost in places that should be familiar to you
- repeating questions
- losing track of time
- problems with decision making or problem solving
- trouble speaking or expressing thoughts
- difficulty with or needing help with daily tasks
- changes in mood, which can include things such as depression, anxiety, or agitation
- trouble with movement and balance
Depression symptoms impact a person nearly every day for
- persistent depressed mood
- feelings of pessimism, worthlessness, or helplessness
- agitation or restlessness
- loss of interest in activities that normally provided happiness
- low energy levels
- sleep changes, such as sleeping too much or very little
- trouble with concentration, memory, or decision making
- extreme changes in eating habits that can lead to noticeable weight loss or weight gain
- thoughts of death or suicide
Dementia and depression are closely linked. Some research suggests that having depression earlier in your life is a risk factor for developing dementia later on.
Depression can also be a symptom of dementia, particularly in the early stages of dementia. But because there’s a lot of overlap between the symptoms of the two conditions, it can be hard to diagnose depression in some people with dementia.
Whether they happen separately or together, people with symptoms of dementia or depression should be evaluated by a healthcare professional. Prompt, early treatment can help improve quality of life.