Do Dementia Patients Sleep a Lot? What Families Should Know

Do dementia patients sleep a lot? Often, yes. Many people living with dementia nap more during the day, sleep longer at night, or flip their schedule so they are awake at night and drowsy by day. It can be worrying to watch, especially when the person used to be an early riser.

The short answer is that more sleep is common as dementia progresses, but it is not always the disease itself, so it is worth checking. I am Mike McClernon, a senior living advisor in Glen Cove with a dementia care certification, and I talk with families about this every week. This guide is general information for worried family members, not medical advice, and the doctor should always be part of the conversation.

Do dementia patients sleep a lot?

Many do, and the amount of sleep tends to increase as the disease advances. Dementia changes the parts of the brain that control the body clock and the sleep cycle, so rest becomes less regular. A person might doze after breakfast, nap through the afternoon and be wide awake at 3 a.m.

Sleep patterns also depend on the type of dementia and the stage. In the early stage, people often sleep normally, or poorly, because of worry. In the middle stage, day and night can start to blur. In later stages, long hours of sleep or drowsiness are common because the body is tiring more easily. You can read more about the whole arc in our post on the stages of dementia and what to expect.

If you want the bigger picture on care, our guide to dementia and memory care options is a good companion. None of this means your loved one is giving up or being lazy. The brain is working harder to do simple things, and that is tiring.

Is sleepiness a sign of dementia?

Sleepiness alone is not a sign of dementia, because many things cause it. But a change in sleep, along with memory trouble, confusion or changes in judgment, is a reason to talk to a doctor.

Sleepiness can come from:

• Depression, which is common in older adults and can look like dementia
• Side effects of medicines, or too many medicines at once
• Infections, such as a urinary tract infection
• Sleep apnea, thyroid problems or heart and lung conditions
• Pain, poor nutrition or dehydration
• Hearing and vision loss, which lead to withdrawal

Several of these can be treated, and some conditions that mimic dementia improve once treated. That is why a medical checkup matters before anyone assumes the worst. Our post on conditions that look like dementia but are treatable lists more of them. If memory problems are new, see how early dementia can start for the warning signs.

Why does dementia change sleep?

Dementia damages the brain cells and networks that keep the sleep wake rhythm, so the body no longer knows reliably when it is day or night. Less daylight, less activity and fewer routines make it worse.

A few patterns are common:

Pattern	What families notice	What may be behind it
Daytime napping	Dozing in a chair after meals	Tiredness, low activity, medicine effects
Night waking	Up and walking at 2 a.m.	A disturbed body clock, needing the bathroom, anxiety
Late day restlessness	Agitated around dusk	Sundowning, fatigue, fading light
Very long sleep	Hard to wake, little interest in meals	Advancing disease, illness, or medicine; check with the doctor

Some people also act out dreams at night, which is more common with Lewy body dementia and is worth mentioning to the doctor. If you feel the late day change in your loved one, our post on common dementia behaviors and foods covers more of what families see.

What helps a person with dementia sleep better?

A steady routine, morning light and daytime activity help more than anything you can buy. The aim is a long, clear difference between day and night.

1. Wake at the same time each day and get outside in morning light if you can.
2. Plan walks, music or simple chores in the daytime, so the body is ready for sleep.
3. Keep naps short and early. A long late nap makes night harder.
4. Limit caffeine, big dinners and alcohol, and offer drinks earlier in the day so night trips to the bathroom are fewer.
5. Make the bedroom calm: dark, quiet, comfortable temperature, a night light so the way to the bathroom is clear.
6. Keep evenings quiet and predictable, with a wind down routine such as soft music.

Please do not give sleep aids, supplements or leftover medicine without asking the doctor. Some common sleep medicines can raise confusion and falls in older adults. The doctor can review all medicines and look for causes. Familiar music and old photos can also settle the evening, and the post on reminiscence therapy for dementia explains how.

When should you call the doctor about sleep?

Call the doctor if the change is sudden, if your loved one is hard to wake, or if sleep changes come with fever, confusion that gets worse quickly, or refusing food and drink. A sudden shift can signal an infection or another medical problem that can be treated.

Other reasons to call include loud snoring with pauses in breathing, falls at night, or a caregiver who can no longer sleep because the person is up all night. Bring notes: when your loved one sleeps, how long, any new medicines, and what happened before the change. A simple sleep log kept for a week is useful.

If your loved one is in the later stages and sleeping most of the day, speak with the care team about comfort. Families sometimes find this the hardest period, and support from a doctor, a hospice or palliative team, or a community that knows the stage can ease the load. The legal side matters too, and our post on whether someone with dementia can sign legal documents explains why paperwork should be done early, while your loved one can still take part.

How can memory care help when nights are hard?

When nights are broken, caregivers get exhausted, and exhausted caregivers get hurt. Memory care communities have staff awake and trained around the clock, so one person is not carrying the whole night alone.

Staff in memory care keep a daily rhythm of meals, activity and rest that supports better sleep, and they know how to respond calmly if a resident wakes and wanders. They can also report patterns to the doctor. Read how a community handles days in our overview of memory care on Long Island.

If you are at the point where you are not sleeping either, that is a valid reason to look. I plan 18 to 24 months past a move, so we choose a place that can handle changing needs. Moving earlier, while your loved one can still settle in, is often gentler than waiting for a crisis.

Who can help your family on Long Island?

I can. Assisted Living Locators of Long Island is at 42 Prospect Ave, Glen Cove, NY 11542, and I serve Nassau County, Suffolk County and Queens. My help is free to families, because communities compensate me when a family moves in.

Start with a short call, and I will ask about sleep, safety, daily care and location, then tour memory care communities with you. Reach out on the contact form, or read more at the Alzheimer’s and dementia memory care overview. You do not have to figure it out alone, and you do not have to do it at night.

Questions readers ask

Read next

• The 7 Stages of Dementia Before Death, in Plain Language
• How Early Can Dementia Start, and How to Calm Someone With Dementia at Night
• What Is the Honey Trick for Dementia? What Families Should Know