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*Dementia Facts Medically Edited by: Charles P. Davis, MD, PhD
Donepezil improves the function of nerve cells in the brain. It works by preventing the breakdown of a chemical called acetylcholine (ah see til KO leen). People with dementia usually have lower levels of this chemical, which is important for the processes of memory, thinking, and reasoning.
Donepezil is used to treat mild to moderate dementia caused by Alzheimer's disease.
Donepezil may also be used for other purposes not listed in this medication guide.
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using donepezil and call your doctor at once if you have any of these serious side effects:
Less serious side effects may include:
This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.
Before taking donepezil, tell your doctor if you have a heart rhythm disorder such as "sick sinus syndrome" (slow heartbeats), an enlarged prostate, urination problems, asthma, obstructive pulmonary disease, or a seizure disorder such as epilepsy.
If you need to have any type of surgery, tell the surgeon ahead of time that you are taking donepezil.
Donepezil can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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