Possible side effects from donepezil include:

nausea
diarrhea
insomnia
vomiting
muscle cramps
fatigue
loss of appetite

Tell your doctor if any of these symptoms are severe or do not go away:

upset stomach
diarrhea
difficulty falling asleep or staying asleep
vomiting
muscle cramps
excessive tiredness
loss of appetite
pain
headache
dizziness
weight loss
depression
abnormal dreams

If you experience any of the following symptoms, call your doctor immediately:

fainting
slow heartbeat
black and tarry stools
red blood in stools
bloody vomit
vomiting material that looks like coffee grounds
difficulty urinating
seizures


Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

 

FDA Information

Why is this medication prescribed?

Other uses for this medicine

Dosage and using this medicine

What special precautions should I follow?

What should I do if I forget a dose?

What storage conditions are needed for this medicine?

In case of an emergency/overdose