Treatments
Donepezil (Aricept)
Donepezil is the most prescribed dementia medication in the world. It doesn't cure, doesn't stop progression, but in many people it sharpens day-to-day function modestly.
Updated 2026-02-15
Written and clinically reviewed by Ashlee Skabla Velez, APRN, ACNPC-AG
Dementia care and caregiver-support specialist
Need help applying this to your situation?
What it does
Donepezil boosts acetylcholine in the brain — a chemical messenger that's depleted in Alzheimer's and Lewy body dementia. Most patients see no dramatic change. Some get a noticeable lift in word-finding, attention, or daily organization within 6–12 weeks.
Starting and titrating
- Typical start: 5 mg at bedtime for 4–6 weeks.
- Then increase to 10 mg if tolerated.
- Some patients move to 23 mg later, though benefit is debated.
Side effects to watch for
- Nausea, diarrhea, loss of appetite (the most common, usually mild).
- Vivid dreams or nightmares — taking it in the morning instead of bedtime can help.
- Slow heart rate — important if your loved one is on heart-rhythm medications.
- Muscle cramps, restless legs.
Frequently asked questions
- Does donepezil work for all dementias?
- Best evidence in Alzheimer's and Lewy body. Less helpful in pure vascular dementia. Not used in frontotemporal.
- How will we know if it's working?
- Pick 2–3 specific things to watch before starting — names of grandchildren, finishing a familiar task, mood. Check them at 8 and 12 weeks.
- When should we stop it?
- When side effects outweigh benefit, or in very late-stage dementia when comfort is the only goal.
Every dementia journey is different.
Memory Lane Care helps you understand what applies to your loved one, what to expect next, and which resources fit your family's situation.
Need help applying this to your situation?
Related across the journey
Memory Lane connects every part of dementia care. Here's how this topic threads into the rest.
Behavior Guidance
Resources
Hard Conversations
Keep reading
Treatments
Lecanemab (Leqembi)
Lecanemab is one of the first FDA-approved infusions that clears amyloid plaques from the brain. It's not a cure — it slows decline modestly in early Alzheimer's.
Treatments
Donanemab (Kisunla)
Donanemab is the second FDA-approved amyloid-clearing infusion for early Alzheimer's. Unlike Lecanemab, it stops once amyloid is cleared from the brain.
Learning
What is dementia?
Dementia is an umbrella term for a decline in memory, thinking, or behavior serious enough to interfere with daily life. It is not a normal part of aging.
Learning
Alzheimer's vs dementia — what's the difference?
Dementia describes the symptoms. Alzheimer's is one specific disease that causes them — the most common one, but not the only one.
GUIDE
Am I eligible for Medicare GUIDE?
GUIDE (Guiding an Improved Dementia Experience) is a Medicare program launched in 2024 that gives families a care navigator, 24/7 helpline, caregiver training, and up to $2,500/year in respite — all at no copay.
Learning
Lewy body dementia
Lewy body dementia (LBD) is the third most common dementia. It shows up differently — visual hallucinations, sleep behaviors, Parkinson-like stiffness — and is dangerous to treat with the wrong medications.
Paying for Care
SSDI for dementia
If your loved one was diagnosed before 65 and was still working, Social Security Disability Insurance (SSDI) can replace income within weeks, not years.
Learning
Dementia medications
No medication cures dementia. Several slow decline modestly, two slow disease progression in early Alzheimer's, and many treat behavioral symptoms. Setting expectations matters.