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Medicine

Donepezil

Donepezil hydrochloride tablet is an acetylcholinesterase inhibitor indicated for the treatment of dementia of the Alzheimer's type.

Medication guideLabel updated 2025-08-01

Selected manufacturer label information, organised into consistent sections by Sofidex. Read the full label at DailyMed ↗

Drug facts

Used for
Donepezil hydrochloride tablet is an acetylcholinesterase inhibitor indicated for the treatment of dementia of the Alzheimer's type.
Do not take if
  • Do not take donepezil hydrochloride tablets if you are allergic to any of the ingredients in donepezil hydrochloride tablets or to medicines that contain piperidines.
  • Ask your doctor if you are not sure.
  • See the end of this leaflet for a list of ingredients in donepezil hydrochloride tablets.

What it is used for

Donepezil Hydrochloride comes as film-coated tablets in dosage strengths of 23 mg.

Donepezil hydrochloride is a prescription medicine to treat mild, moderate and severe Alzheimer's disease. Donepezil hydrochloride can help with mental function and with doing daily tasks. Donepezil hydrochloride does not work the same in all people. Some people may:

  • Seem much better
  • Get better in small ways or stay the same
  • Get worse over time but slower than expected
  • Not change and then get worse as expected

Donepezil hydrochloride does not cure Alzheimer's disease. All patients with Alzheimer's disease get worse over time, even if they take donepezil hydrochloride.

Donepezil hydrochloride has not been approved as a treatment for any medical condition in children.

Side effects, and when to stop

Donepezil Hydrochloride may cause the following serious side effects:

  • slow heartbeat and fainting. This happens more often in people with heart problems. Call your doctor right away if

you feel faint or lightheaded while taking donepezil hydrochloride.

  • more stomach acid. This raises the chance of ulcers and bleeding, especially when taking donepezil hydrochloride 23

mg tablet. The risk is higher for people who have had ulcers, or take aspirin or other NSAIDs.

  • difficulty passing urine.

Call your doctor right away if you have:

  • fainting.
  • nausea or vomiting, blood in the vomit, dark vomit that looks like coffee grounds.
  • bowel movements or stools that look like black tar.
  • seizures.
  • difficulty passing urine.

The most common side effects of Donepezil Hydrochloride are:

  • nausea
  • not sleeping well
  • vomiting
  • feeling tired
  • not wanting to eat

These side effects may get better after you take Donepezil Hydrochloride for a while. This is not a complete list of side effects with Donepezil Hydrochloride. For more information, ask your doctor or pharmacist.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Who should not take it

Do not take donepezil hydrochloride tablets if you are allergic to any of the ingredients in donepezil hydrochloride tablets or to medicines that contain piperidines. Ask your doctor if you are not sure. See the end of this leaflet for a list of ingredients in donepezil hydrochloride tablets.

What to say before you start

Tell the doctor about all of your present or past health problems and conditions. Include:

  • Any heart problems including problems with irregular, slow, or fast heartbeats
  • Asthma or lung problems
  • A seizure
  • Stomach ulcers
  • Difficulty passing urine
  • Liver or kidney problems
  • Trouble swallowing tablets
  • Present pregnancy or plans to become pregnant. It is not known if donepezil hydrochloride can harm an unborn baby.
  • Present breast-feeding. It is not known if donepezil hydrochloride passes into breast milk. Talk to your doctor about the best way to feed your baby if you take donepezil hydrochloride.

Tell the doctor about all the medicines you take, including prescription and non-prescription medicines, vitamins, and herbal products. Donepezil hydrochloride and other medicines may affect each other.

Be particularly sure to tell the doctor if you take aspirin or medicines called nonsteroidal anti-inflammatory drugs (NSAIDs). There are many NSAID medicines, both prescription and non-prescription. Ask the doctor or pharmacist if you are not sure if any of your medicines are NSAIDs. Taking NSAIDs and donepezil hydrochloride together may make you more likely to get stomach ulcers.

Donepezil hydrochloride taken with certain medicines used for anesthesia may cause side effects. Tell the responsible doctor or dentist that you take donepezil hydrochloride before you have:

  • surgery
  • medical procedures
  • dental surgery or procedures.

Know the medicines that you take. Keep a list of all your medicines. Show it to your doctor or pharmacist before you start a new medicine.

How should you take Donepezil Hydrochloride Tablets?

  • Take donepezil hydrochloride tablets exactly as prescribed by the doctor. Do not stop donepezil hydrochloride

tablets or change the dose yourself. Talk with your doctor first.

  • Take donepezil hydrochloride tablets one time each day. Donepezil hydrochloride tablets can be taken with or

without food.

  • Donepezil hydrochloride 23 mg tablets should be swallowed whole. Do not split, crush, or

chew the tablets.

  • If you miss a dose of donepezil hydrochloride tablets just wait. Take only the next dose at the

usual time. Do not take 2 doses at the same time.

  • If donepezil hydrochloride tablet is missed for 7 days or more, talk with your doctor before starting again.
  • If you take too much donepezil hydrochloride tablets at one time, call your doctor or poison control

center, or go to the emergency room right away.

How should Donepezil Hydrochloride Tablets be stored?

Store at 20º-25ºC (68º-77ºF), excursions permitted to 15º-30ºC (59º-86ºF).

Keep Donepezil Hydrochloride Tablets and all medicines out of the reach of children.

General information about Donepezil Hydrochloride

Medicines are sometimes prescribed for conditions that are not mentioned in this Patient Information Leaflet. Do not use donepezil hydrochloride for a condition for which it was not prescribed. Do not give donepezil hydrochloride to other people, even if they have the same symptoms or condition. It may harm them.

This leaflet summarizes the most important information about donepezil hydrochloride. If you would like more information, talk with your doctor. You can ask your pharmacist or doctor for information about donepezil hydrochloride that is written for health professionals.

Cite this page

NLM

sofidex [Internet]. Daloreum; c2026. Donepezil; [reviewed 2026 Aug 2; cited 2026 Nov 10]. Available from: https://sofidex.com/patients/medicines/donepezil

APA 7th

sofidex. (2026, August 2). Donepezil. Daloreum. Retrieved November 10, 2026, from https://sofidex.com/patients/medicines/donepezil

AMA 11th

Donepezil. sofidex. Reviewed August 2, 2026. Accessed November 10, 2026. https://sofidex.com/patients/medicines/donepezil

The cited date is today’s, because a citation records when you read the page. The reviewed date is when a clinician last checked it.