What Is Sundowning? (Definition and Meaning) Sundowning — also called sundowner's syndrome, sundown syndrome, or late-day confusion — is a pattern of worsening confusion, agitation, and behavioural changes that occurs in the late afternoon and evening in people with dementia or Alzheimer's disease. It's not a separate disease. It's a symptom pattern — a recognizable cluster of behaviours that shows up like clockwork as the day fades. The medical community doesn't have a single agreed-upon definition, but every dementia caregiver knows exactly what it looks like. Key facts: Affects 20-45% of people with Alzheimer's and other dementias — some studies put it even higher More common in mid-stage dementia but can happen at any stage Can also affect older adults without dementia who are hospitalized, post-surgery, or in unfamiliar environments Usually worsens over time as dementia progresses, then may decrease in late-stage dementia when overall activity declines It is not the person being difficult — it's their damaged brain struggling to process a world that becomes more confusing as the day goes on What Time Does Sundowning Start?

This is one of the most-searched questions about sundowning — and the answer matters because knowing the timing lets you prepare. Sundowning typically begins between 2 PM and 6 PM, with the peak window being 4 PM to 7 PM for most people. But it varies: Early sundowning (2-3 PM): More common in people who are already fatigued, didn't sleep well, or had a stimulating morning (doctor visit, visitors, outing) Classic sundowning (4-6 PM): The most typical pattern. Starts as the light changes and the afternoon energy crashes Evening sundowning (6-9 PM): Sometimes triggered by dinner chaos, transition to nighttime routine, or the moment lighting shifts from natural to artificial Night extension: In some cases, agitation continues until 11 PM, midnight, or later. Some people are up until 2-3 AM, then sleep until midday, inverting their entire cycle The timing often shifts with the seasons. In winter, when it gets dark at 4:30 PM, sundowning may start earlier. In summer, the longer daylight can push it later. Many Canadian families notice a significant worsening during the fall time change — losing that hour of evening light can be a trigger. If you're caregiving, start your sundowning prevention routine at least 2 hours before it usually starts. If your parent typically gets agitated at 5 PM, your afternoon strategy should begin by 3 PM.

Sundowning in Dementia: What Time It Starts, Why It Happens & What Actually Helps (2026)

Q: What is the difference between sundowning and sundowners syndrome?

They're the same thing. Sundowning, sundowner's syndrome, sundown syndrome, and late-day confusion all refer to the same pattern of increased agitation, confusion, and behavioural changes in the late afternoon and evening in people with dementia. The medical literature most commonly uses "sundowning" or "sundown syndrome." There is no difference in meaning between these terms.

Q: Can sundowning happen without dementia?

Yes. Sundowning can occur in older adults without dementia who are in unfamiliar environments — particularly those who are hospitalized, recovering from surgery, or experiencing delirium from an infection or medication reaction. It can also happen in people with traumatic brain injuries or severe sleep disorders. However, it is far more common and persistent in people with Alzheimer's disease and other dementias.

Q: How long does a sundowning episode last?

A typical episode lasts 2 to 4 hours, most commonly from late afternoon into the evening. Some people experience shorter episodes of 1-2 hours, while others may be agitated from 4 PM until midnight or later. The duration tends to increase as dementia progresses. On particularly bad days — after a medical appointment, a disrupted routine, or a poor night's sleep — episodes may start earlier and last longer.

It’s 4 PM. Your mom was fine this morning — she ate breakfast, watched her show, even laughed at something on the phone. Now she’s standing in the hallway, agitated, insisting she needs to “go home.” She IS home. She’s lived here for 30 years. But right now, she doesn’t know that. By 7 PM she won’t recognize you.

Tomorrow morning she’ll be herself again. And tomorrow at 4 PM, it will start over.

This is sundowning. It happens to 20-45% of people with dementia, and if you’re living through it, you already know it’s the hardest part of caregiving — harder than the diagnosis, harder than the medical appointments, harder than any of it. Because it happens every single day, at the exact time when you’re already exhausted.

This guide covers everything we know about sundowning: what causes it, what time it typically starts, what actually helps (backed by evidence), what medications exist, and — honestly — when it might mean your loved one needs more care than you can provide at home.

What Is Sundowning? (Definition and Meaning)

Sundowning — also called sundowner’s syndrome, sundown syndrome, or late-day confusion — is a pattern of worsening confusion, agitation, and behavioural changes that occurs in the late afternoon and evening in people with dementia or Alzheimer’s disease.

It’s not a separate disease. It’s a symptom pattern — a recognizable cluster of behaviours that shows up like clockwork as the day fades. The medical community doesn’t have a single agreed-upon definition, but every dementia caregiver knows exactly what it looks like.

Key facts:

Affects 20-45% of people with Alzheimer’s and other dementias — some studies put it even higher
More common in mid-stage dementia but can happen at any stage
Can also affect older adults without dementia who are hospitalized, post-surgery, or in unfamiliar environments
Usually worsens over time as dementia progresses, then may decrease in late-stage dementia when overall activity declines
It is not the person being difficult — it’s their damaged brain struggling to process a world that becomes more confusing as the day goes on

What Time Does Sundowning Start?

This is one of the most-searched questions about sundowning — and the answer matters because knowing the timing lets you prepare.

Sundowning typically begins between 2 PM and 6 PM, with the peak window being 4 PM to 7 PM for most people. But it varies:

Early sundowning (2-3 PM): More common in people who are already fatigued, didn’t sleep well, or had a stimulating morning (doctor visit, visitors, outing)
Classic sundowning (4-6 PM): The most typical pattern. Starts as the light changes and the afternoon energy crashes
Evening sundowning (6-9 PM): Sometimes triggered by dinner chaos, transition to nighttime routine, or the moment lighting shifts from natural to artificial
Night extension: In some cases, agitation continues until 11 PM, midnight, or later. Some people are up until 2-3 AM, then sleep until midday, inverting their entire cycle

The timing often shifts with the seasons. In winter, when it gets dark at 4:30 PM, sundowning may start earlier. In summer, the longer daylight can push it later. Many Canadian families notice a significant worsening during the fall time change — losing that hour of evening light can be a trigger.

If you’re caregiving, start your sundowning prevention routine at least 2 hours before it usually starts. If your parent typically gets agitated at 5 PM, your afternoon strategy should begin by 3 PM.

Sundowning Symptoms: What It Actually Looks Like

Sundowning doesn’t look the same in everyone. Your parent might show one or two of these, or all of them on a bad day:

Behavioural symptoms

Agitation and restlessness — pacing, fidgeting, can’t sit still, wringing hands
Aggression — verbal outbursts, swearing (even if they never swore before), hitting, pushing, resisting care
Wandering — trying to leave the house, “looking for” something or someone, heading for the door
Shadowing — following you from room to room, panicking if you’re out of sight even for a moment
Repetitive behaviours — asking the same question over and over, rummaging through drawers, packing and unpacking bags

Emotional symptoms

Anxiety and fear — looking frightened, clinging, saying they’re scared
Crying or emotional outbursts — sudden tears with no apparent trigger
Paranoia and suspicion — accusing you of stealing, believing strangers are in the house
Wanting to “go home” — even when they are home. They often mean the home they remember from decades ago, or a feeling of safety that no physical place can provide anymore

Cognitive symptoms

Increased confusion — not knowing where they are, what year it is, who you are
Hallucinations — seeing people who aren’t there, hearing voices, misidentifying objects (a coat on a hook becomes a person)
Disorientation in time — believing it’s morning when it’s evening, or that they need to go to a job they retired from 20 years ago

One important distinction: sundowning behaviours are NOT the person’s personality. When your gentle father becomes aggressive at 6 PM, that’s the disease, not him. This is easy to understand intellectually and incredibly hard to live with emotionally.

What Causes Sundowning?

Researchers have studied sundowning for decades and still don’t have one definitive answer. What they’ve found is that it’s usually multiple factors combining — not a single cause.

1. Damage to the body’s internal clock

Your brain has a built-in clock called the suprachiasmatic nucleus (SCN) that tells your body when to be awake and when to sleep. In Alzheimer’s disease and other dementias, this part of the brain is one of the first areas to be damaged.

When the SCN stops working properly, the body loses its ability to read environmental cues about time. The transition from daylight to darkness — which a healthy brain handles seamlessly — becomes confusing and distressing. The brain literally doesn’t know what time it is, and that confusion manifests as agitation.

2. Mental exhaustion (“cognitive battery drain”)

Think of dementia like a phone battery that only charges to 40%. In the morning, your parent has their best 40%. They can hold a conversation, eat independently, maybe even crack a joke. By mid-afternoon, that battery is at 5%. Everything becomes harder — processing sounds, recognizing faces, understanding where they are, making sense of anything.

When the brain is that depleted, it goes into a kind of panic mode. The result looks like agitation, but it’s actually the brain’s distress signal.

3. Changing light and shadows

As natural light fades, the visual environment changes dramatically. Shadows lengthen. Colours shift. Familiar rooms look different. For someone with impaired visual processing — which is common in dementia, even when the eyes themselves are fine — this is genuinely disorienting.

A shadow on the wall becomes a figure. The dark hallway becomes threatening. The mirror becomes a stranger staring at them. This isn’t imagination — it’s a brain that can no longer correctly interpret what the eyes see.

4. Unmet physical needs

Sometimes what looks like sundowning is actually your parent trying to communicate something they can no longer articulate:

Pain — arthritis, constipation, dental problems, urinary tract infections. All common in seniors, all get worse with fatigue, all cause agitation
Hunger or thirst — they may have forgotten to eat or drink enough during the day
Needing the bathroom — and not being able to find it or articulate the need
Temperature discomfort — too hot, too cold, wearing uncomfortable clothing
Boredom or loneliness — a long, unstimulating afternoon can build into restless agitation

Always rule out physical needs first. A surprising number of “sundowning episodes” resolve with a snack, a bathroom trip, or a pain reliever.

5. Medication timing and side effects

This is an underappreciated factor. Medications that cause or worsen sundowning include:

Anticholinergics — found in many over-the-counter sleep aids (diphenhydramine/Benadryl), some bladder medications (oxybutynin), and some antidepressants. These directly worsen confusion in people with dementia
Benzodiazepines — Ativan (lorazepam), Valium (diazepam). Paradoxically, these anti-anxiety medications can increase confusion and agitation in seniors with dementia
Blood pressure medications — some can cause lightheadedness and confusion, especially when doses are wearing off in the afternoon
Cholinesterase inhibitors (donepezil, rivastigmine) — the very medications prescribed for dementia can cause sleep disruption if taken at the wrong time of day
Steroids (prednisone) — cause restlessness and sleep disturbance
Diuretics — if taken too late in the day, they cause nighttime bathroom trips that disrupt sleep

Action step: Print your parent’s complete medication list and ask their doctor or pharmacist specifically: “Could any of these medications be contributing to late-afternoon confusion?” A simple timing change — moving a dose from evening to morning, or vice versa — sometimes makes a measurable difference.

6. Overstimulation during the day

Doctor appointments, visitors, outings, loud TV, unfamiliar environments — any of these can use up cognitive energy faster. Families often notice worse sundowning on days that had more activity. It’s counterintuitive (shouldn’t a good day lead to a good evening?), but a stimulating day means the battery drains faster.

7. Seasonal and environmental factors

Canadian families are particularly affected by seasonal changes:

Fall daylight saving time — losing an hour of evening light often triggers a noticeable worsening that can take weeks to settle
Winter darkness — shorter days mean less natural light exposure, which further disrupts the circadian rhythm
Overheated homes — dry, overheated air in winter causes dehydration, which worsens confusion
Seasonal isolation — less outdoor time, fewer visitors in winter, more time spent in dim rooms

What Actually Helps: Evidence-Based Strategies

There is no cure for sundowning. But there are interventions that consistently reduce the frequency and severity of episodes. I’m ranking these by strength of evidence, not ease of implementation.

1. Light therapy (strongest evidence)

This is the single most evidence-backed intervention for sundowning. Multiple clinical studies show that bright light exposure during the day helps reset the damaged circadian rhythm and reduces late-day agitation.

How to do it:

Morning sunlight: Get your parent outside for 30+ minutes in the morning. Even sitting by a sunny window helps. Morning light is more effective than afternoon light for circadian regulation
Light therapy box: A 10,000-lux light therapy lamp (the kind used for seasonal affective disorder) used for 30 minutes each morning, positioned 12-24 inches from the face. They don’t need to stare at it — just be near it. Cost: $30-$80 on Amazon
Keep the house bright in the afternoon: Turn on all the lights before sunset. Don’t let the house gradually dim as the daylight fades — that transition IS the trigger. Make it bright and keep it bright
Warm evening lighting: Switch to warm-toned (2700K) bulbs in the evening. Avoid harsh fluorescents. Smart bulbs that gradually shift from bright white to warm amber can help simulate a gentle transition
Close curtains before dark: If seeing darkness outside triggers anxiety, close the curtains while it’s still light and use indoor lighting to maintain consistency

2. Structured daily routine

Predictability is medicine for a confused brain. When your parent can’t make sense of the world, familiar patterns become an anchor. The routine doesn’t need to be rigid — it needs to be consistent.

Same wake time every day (within 30 minutes)
Same meal times
Same afternoon activity window (2-4 PM)
Same pre-bedtime routine (start at the same time every night)
Limit surprises, schedule changes, and unplanned visitors in the afternoon

3. Afternoon activity (the 2-4 PM window)

The hours before sundowning typically starts are your intervention window. A calm, structured activity between 2-4 PM can prevent the build-up that leads to evening agitation.

What works:

A short walk (even 15 minutes helps with both physical fatigue and light exposure)
Folding laundry, sorting objects, simple repetitive tasks that give a sense of purpose
Looking at family photo albums (engages long-term memory, which is more preserved)
Gentle music from their era — not background noise, but intentional listening
A snack with protein and complex carbs (blood sugar drops can worsen confusion)

What doesn’t work:

TV news (agitating content + rapidly changing visuals overwhelm impaired processing)
Complex games or activities that highlight what they can’t do anymore
New environments or new people in the afternoon
Vigorous exercise close to sundowning time (too stimulating)

4. Reduce evening stimulation

Create what one geriatrician I spoke with called a “soft landing into nighttime”:

Turn off the TV news. Switch to calm music or a familiar movie they’ve seen 100 times
Lower the volume on everything
Reduce the number of people in the room
Avoid starting new conversations or tasks after 6 PM
Keep the environment physically warm and emotionally calm

5. Check for pain (the hidden trigger)

People with dementia often cannot tell you they’re in pain. Instead, pain shows up as agitation, aggression, or restlessness — which looks exactly like sundowning.

Common culprits:

Urinary tract infections (UTIs) — the #1 hidden trigger. UTIs in seniors with dementia cause dramatic changes in behaviour, including sudden worsening of sundowning. If agitation appears suddenly or spikes, ask the doctor to test for a UTI
Arthritis pain — worse in the evening after a day of activity
Constipation — surprisingly common and surprisingly impactful on behaviour
Dental pain — often overlooked because the person can’t articulate it
Ill-fitting dentures — cause pain with every meal, building frustration through the day

If sundowning suddenly gets worse, pain is the first thing to investigate — before adjusting routines, lighting, or medications.

6. Sleep hygiene

Limit daytime naps to one short nap (30 minutes max) before 2 PM. Long or late naps disrupt nighttime sleep, which worsens next-day sundowning
No caffeine after 12 PM (check tea, chocolate, and soft drinks too)
Bedroom should be dark, cool (18-20°C), and quiet at night
A consistent bedtime routine: warm bath or wash, change into pajamas, brush teeth, a few minutes of calm music or reading. Same order, same time, every night
If your parent is inverting their sleep cycle (up all night, sleeping all day), this is the first thing to correct — it requires gradually shifting the schedule, which is exhausting but critical

7. Nutrition and hydration

Dehydration worsens confusion in everyone — in someone with dementia, even mild dehydration can trigger or worsen sundowning. Most seniors don’t drink enough water because their thirst sensation is reduced.

Offer water, juice, or decaf tea regularly throughout the day (don’t wait for them to ask)
Aim for 6-8 glasses of fluid by 6 PM (reduce fluids in the evening to avoid nighttime bathroom trips)
A protein-rich afternoon snack (cheese, nuts, yogurt) can stabilize blood sugar through the evening
Avoid heavy, late dinners — large meals redirect blood flow to digestion, which can temporarily worsen cognitive function

Medications for Sundowning

Non-drug strategies should always come first. But when sundowning is severe — your parent is hitting you, trying to escape the house, or so distressed they’re a danger to themselves — medication becomes part of the conversation.

Talk to your parent’s doctor. Self-medicating with over-the-counter products is dangerous in people with dementia.

First-line medications (lower risk)

Melatonin (0.5-3mg): Taken 1-2 hours before bedtime. The evidence is modest but it’s very low-risk. May help with sleep onset and circadian regulation. Start with the lowest dose. Available over the counter but still discuss with the doctor because it can interact with blood thinners and diabetes medications
Trazodone (25-100mg): Often the first prescription choice. A low-dose antidepressant with sedative properties. Generally well-tolerated in seniors. Taken in the evening, it can reduce agitation and improve sleep without the risks of stronger sedatives
SSRIs (citalopram, sertraline): Can reduce overall agitation and anxiety over time. Takes 2-4 weeks to reach full effect. Citalopram in particular has some evidence for agitation in Alzheimer’s at low doses

Second-line medications (use with caution)

Cholinesterase inhibitors (donepezil, rivastigmine): If your parent is already taking one of these for dementia, adjusting the timing of the dose can sometimes help. Donepezil taken in the morning instead of evening reduces nighttime insomnia in some patients
Gabapentin: Sometimes used off-label for sundowning agitation, particularly when pain is a contributing factor

Last-resort medications (serious risks)

Antipsychotics (risperidone, quetiapine, olanzapine): Used only for severe aggression, psychosis, or behaviours that pose a safety risk. These carry a Health Canada black box warning for increased risk of stroke and death in elderly patients with dementia. Short-term use only. Requires regular reassessment. Your parent’s doctor should discuss the specific risks with you before prescribing
Benzodiazepines (lorazepam): Generally avoided in dementia because they worsen confusion, increase fall risk, and can cause paradoxical agitation (making the person MORE agitated). Occasionally used for acute crisis management only

Critical warning: Never give your parent Benadryl (diphenhydramine), over-the-counter sleep aids, or herbal “calming” supplements without consulting their doctor. Diphenhydramine is on the Beers Criteria list of medications that should be avoided in older adults — it worsens confusion and increases fall and delirium risk.

What to Do During a Sundowning Episode (In the Moment)

Prevention is ideal. But when your parent is in the middle of an episode — confused, frightened, maybe aggressive — here’s what to do:

Do:

Stay calm. Your stress directly escalates theirs. If you need to take 3 deep breaths before responding, do it. Speak slowly, quietly, in short sentences
Validate, don’t correct. If they say “I need to pick up the children from school” (the children are 50), say: “The children are safe. They’re all taken care of. Let’s have some tea.” Correcting them — “Mom, the kids are grown” — creates an argument you cannot win and that distresses them further
Redirect, don’t restrict. If they’re pacing, walk with them. If they want to leave, say “Let me get your coat” and then gently redirect to another activity. Physical restraint makes everything exponentially worse
Turn on every light. Brighten the room immediately. Close curtains if outside darkness is triggering. Eliminate shadows
Offer comfort. A warm decaf drink. A familiar blanket. Holding their hand. Music from their youth. The comfort doesn’t need to be logical — it needs to be sensory
Check the basics. Hungry? Thirsty? Bathroom? Too warm? In pain? Address any physical need first

Don’t:

Don’t argue. There is no version of “but you ARE home” that will work. Their brain cannot process that information right now
Don’t take it personally. If they say “who are you?” or “I want my REAL daughter” — that’s the disease obliterating their facial recognition, not a reflection of your relationship
Don’t physically restrain. Grabbing their arm, blocking the door with your body, using bed rails to keep them down — all of these increase agitation and risk of injury to both of you
Don’t ask complex questions. “What do you want for dinner?” has too many choices. “Here’s your soup” is better
Don’t try to reason. Logic requires the prefrontal cortex, which is damaged. You’re speaking a language their brain can’t process in this state

Sundowning Stages: Does It Get Worse Over Time?

Yes — but not in a straight line. Here’s the typical progression:

Early-stage dementia

Sundowning may not appear yet, or may be mild — increased irritability in the evening, occasional confusion, difficulty concentrating after dark. Many families don’t even recognize it as sundowning at this stage.

Mid-stage dementia

This is when sundowning typically peaks. The brain has enough damage to disrupt circadian rhythms and cognitive processing, but the person still has enough awareness and physical ability to act on their confusion. Wandering, aggression, and severe agitation are most common in this stage.

Late-stage dementia

Sundowning often decreases in late-stage dementia — but not because the brain is recovering. It’s because overall activity and awareness have declined to the point where the person has less ability to express distress. The underlying circadian disruption is still there, but it may manifest more as disturbed sleep patterns than active agitation.

Life Expectancy and Sundowning

This is a question many families search for but few articles address directly. Here’s what we know:

Sundowning itself does not directly affect life expectancy. It’s a symptom of dementia, not a separate disease process. However, the presence and severity of sundowning can be an indicator of where someone is in their dementia journey.

What the research shows:

People with severe sundowning tend to have faster cognitive decline compared to those without it
Sundowning is associated with higher caregiver burden, which often leads to earlier placement in long-term care
Sleep disruption (a core feature of sundowning) is linked to faster brain deterioration
The behaviours associated with sundowning — wandering, aggression, falls — carry their own injury risks

The honest answer: life expectancy depends on the type and stage of dementia, not on sundowning specifically. Average life expectancy after an Alzheimer’s diagnosis is 4-8 years, though some people live 20 years. The presence of sundowning suggests mid-stage disease in most cases, but it’s not a reliable predictor of how much time remains.

If you’re asking this question, you may be in a place where understanding the broader trajectory would help. Read our guide to long-term care in Canada for information about planning for what comes next.

When Sundowning Means You Need More Help

Sundowning is exhausting. If you’re handling evening episodes alone, night after night, you will burn out. Not might — will.

Signs it’s time to bring in help:

You haven’t slept through the night in weeks because your parent is up
You’re afraid during episodes — they’re hitting, throwing things, or physically overpowering you
They’ve gotten out of the house during a wandering episode
You’re using more sick days at work than vacation days
Your own health is declining — weight loss, chronic headaches, depression, chest pain
You’ve yelled at your parent or handled them roughly, and you’re horrified at yourself

That last one is not a character flaw. It’s a human being pushed past their breaking point. If it’s happening, you need support now — not next month.

Options for help

Evening or overnight home care: A PSW covers the sundowning hours (typically 4-10 PM or overnight) so you can rest. Many agencies offer shifts specifically for this. Private cost: $28-$45/hour. Some hours may be available through Ontario Health atHome or your provincial home care program
Respite care: Regular scheduled breaks — a few hours weekly, or a short facility stay so you can recharge. This is not a luxury. It’s the only way to sustain caregiving long-term
Adult day programs: Your parent attends a supervised program during the day. The physical activity and social stimulation often reduce evening sundowning, and you get 6-8 hours of daytime freedom
Memory care residences: If sundowning becomes unmanageable at home, purpose-built memory care environments are designed for exactly this. Staff are trained in dementia behaviours, the building is safe for wandering, and families can go back to being family instead of full-time nurses

Moving your parent to memory care is not giving up. It’s recognizing that their needs have exceeded what one person can safely provide. If you’re struggling with this decision, read our guide on the guilt of placing a parent in care.

If you’re already experiencing caregiver burnout, please read our guide. You can’t pour from an empty cup — and right now, your cup may be dry.

Understanding Dementia: More Guides

Sundowning is one piece of the dementia puzzle. These guides cover what happens at each stage and what to expect with different types:

Frequently Asked Questions About Sundowning

What time does sundowning start?

Sundowning most commonly begins between 2 PM and 6 PM, with the peak window being 4 PM to 7 PM. The timing can vary by person and by season — it often starts earlier in winter when daylight fades sooner. Some people experience extended episodes that last until midnight or later. Knowing your loved one’s specific pattern lets you start prevention strategies 1-2 hours before the typical onset.

What is the difference between sundowning and sundowners syndrome?

They’re the same thing. Sundowning, sundowner’s syndrome, sundown syndrome, and late-day confusion all refer to the same pattern of increased agitation, confusion, and behavioural changes in the late afternoon and evening in people with dementia. The medical literature most commonly uses “sundowning” or “sundown syndrome.” There is no difference in meaning between these terms.

Can sundowning happen without dementia?

Yes. Sundowning can occur in older adults without dementia who are in unfamiliar environments — particularly those who are hospitalized, recovering from surgery, or experiencing delirium from an infection or medication reaction. It can also happen in people with traumatic brain injuries or severe sleep disorders. However, it is far more common and persistent in people with Alzheimer’s disease and other dementias.

What medications help with sundowning?

The most commonly prescribed medications for sundowning include melatonin (0.5-3mg, low risk), trazodone (25-100mg, often first-choice prescription), and SSRIs like citalopram (for ongoing agitation). Antipsychotics like risperidone or quetiapine are used as a last resort for severe cases but carry serious risks in elderly patients, including increased stroke risk. Non-medication strategies (light therapy, routine, afternoon activity) should always be tried first. Never give over-the-counter sleep aids like Benadryl to someone with dementia — they worsen confusion.

Does sundowning mean dementia is getting worse?

Not necessarily — but it can be an indicator. Sundowning is most common and most severe during mid-stage dementia. New onset of sundowning in someone with early dementia may signal progression. However, sudden worsening of sundowning can also be caused by a urinary tract infection, medication change, pain, or environmental factors — all of which are treatable. If sundowning suddenly gets worse, see the doctor to rule out reversible causes before assuming it’s disease progression.

How long does a sundowning episode last?

A typical episode lasts 2 to 4 hours, most commonly from late afternoon into the evening. Some people experience shorter episodes of 1-2 hours, while others may be agitated from 4 PM until midnight or later. The duration tends to increase as dementia progresses. On particularly bad days — after a medical appointment, a disrupted routine, or a poor night’s sleep — episodes may start earlier and last longer.

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