Easy-to-read medicine information about donepezil – what it is, how to take it safely and possible side effects.
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What is donepezil?
Donepezil is in a class of medications called cholinesterase inhibitors. It is used to treat dementia associated with Alzheimer's disease. Donepezil helps to ease the symptoms of mild to moderate dementia in Alzheimer's disease, such as memory loss, but does not cure it. Donepezil works by increasing the amount of a chemical in the brain called acetylcholine, which is known to be lower in people suffering from dementia in Alzheimer's disease. Read more about medicines for dementia.
In New Zealand donepezil is available as tablets (5 mg and 10 mg).
Dose
- The usual starting dose of donepezil is 5 milligrams daily.
- After at least 1 month, your doctor will assess your response and may increase your dose to 10 milligrams daily.
- Always take your donepezil exactly as your doctor has told you. The pharmacy label on your medicine will tell you how much donepezil to take, how often to take it and any special instructions.
- You will need to see your doctor regularly to check your response to treatment, if the dose is right and if this medicine is right for you.
How to take donepezil?
- Take donepezil once a day, in the evening before bedtime.
- You can take donepezil with or without food.
- Keep taking donepezil every day. It may take a while before you experience the full benefits of the medication.
- Donepezil tablets are available in different strengths (5 mg and 10 mg). Check with your pharmacist if your tablets are different to what you expect.
- It is important that you take donepezil each night. If you forget to take your dose, take it as soon as you remember. But, if it is nearly time for your next dose, just take the next dose at the right time. Do not take double the dose.
- If you forget to take donepezil for more than a few days, talk with your doctor before starting to take it again. You may need to restart donepezil on a lower dose. Read more about tips when taking medicines for dementia.
Precautions – before starting donepezil
- Do you have problems with your liver?
- Do you have any heart problems such as an irregular heart beat?
- Do you have problems with your breathing such as asthma or COPD?
- Do you have problems passing urine (peeing)?
- Do you have epilepsy?
- Have ever had a stomach (gastric) or duodenal ulcer?
- Are you taking any other medicines, including medicines you can buy without a prescription, such as herbal and complementary medicines, or antihistamines for hay fever or pain relief medicines?
If so, it’s important that you tell your doctor or pharmacist before you start donepezil. Sometimes a medicine isn’t suitable for a person with certain conditions or it can only be used with extra care.
Possible side effects
Like all medicines, donepezil can cause side effects, although not everyone gets them. Often side effects improve as your body gets used to the new medicine
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Learn more
Medsafe Consumer Information Sheet Aricept
References
- The pharmacological management of Alzheimer’s disease – the place of donepezil BPAC, NZ, 2010
- Antipsychotics in dementia – best practice guide BPAC, NZ
- Managing patients with dementia – what is the role of antipsychotics? BPAC, NZ, 2013
- Donepezil New Zealand Formulary