Donepezil Side Effects

Donepezil is a cholinesterase inhibitor. It works by increasing the amount of a certain substance (acetylcholine) in the brain, which may help reduce the symptoms of dementia in patients with Alzheimer disease.
In addition to its needed effects, some unwanted effects may be caused by donepezil. In the event that any of these side effects do occur, they may require medical attention.
More common
Diarrhea
loss of appetite
muscle cramps
nausea
trouble in sleeping
unusual tiredness or weakness
vomiting