Donepezil treats Alzheimer’s disease by improving mental function. It doesn’t work the same way in everybody, and may worsen symptoms in some. It is not a cure for Alzheimer’s.

Do not stop taking donepezil without your doctor’s approval. Swallow the regular tablet with/without food. The orally disintegrating tablet should only be unpackaged when you’re ready to take it. Drink a full glass of water after it dissolves. Contact your doctor if you miss more than 7 days’ doses in a row before re-taking your medication. Alert medical personnel beforehand of your donepezil use before undergoing any medical procedure.

Before taking donepezil, tell your doctor your medical history and allergies, especially if you’ve had a heart rhythm disorder, stomach ulcer, urination issues, breathing disorder, liver or kidney disease, seizure, or trouble swallowing tablets. As donepezil can interact with other drugs, also tell your doctor the other medications you take, if you become pregnant, or breast-feed. Overdose symptoms include: nausea and vomiting, drooling, blurred vision, lightheadedness, slow pulse, shallow breathing, weakness, convulsions, and fainting.

Go find medical help immediately if you suspect an overdose or allergic reaction. Contact your doctor at once if you experience a serious side effect, including: slow pulse, lightheadedness, heartburn or stomach pain, seizure, difficult urination, breathing problems, or symptoms of stomach bleeding. Other side effects may include: upset digestive system, loss of appetite, muscle pain, insomnia, and fatigue. As donezepil can interact with other drugs, inform your doctor of your other medications, especially before taking an NSAID like aspirin or ibuprofen.