Dementia and Alzheimer's Medications — What Family Caregivers Need to Know

The neurologist confirmed what you already suspected: your mother has Alzheimer's disease. Before you left the office, she was prescribed donepezil — brand name Aricept. The doctor said it might slow the progression. He did not say how much, for how long, or what "slow" actually means in practical terms. You drove home with a prescription and a thousand questions.

This is the guide you need right now. Not a medical textbook — a plain-language explanation of what dementia medications do, what they do not do, and what you should watch for as a caregiver.

The two main categories of dementia medication

Nearly all currently approved medications for Alzheimer's disease and related dementias fall into two categories: cholinesterase inhibitors and NMDA receptor antagonists. Understanding what each does — and does not do — sets realistic expectations.

Cholinesterase inhibitors

These include donepezil (Aricept), rivastigmine (Exelon), and galantamine (Razadyne). They work by increasing levels of acetylcholine, a brain chemical involved in memory and judgment. In Alzheimer's disease, the neurons that produce acetylcholine are damaged, so these drugs essentially boost the supply of what remains.

What they do: In some patients, they temporarily stabilize or modestly improve cognitive function. "Modestly" is the key word — the effects are typically measured in points on cognitive assessment scales, not in dramatic real-world changes. The benefit, when it occurs, usually lasts 6 to 12 months before the underlying disease progression overtakes it.

What they do not do: They do not stop, reverse, or cure Alzheimer's. They do not restore lost memories. They are treating symptoms, not the disease itself.

Common side effects: Nausea, vomiting, diarrhea, loss of appetite, and vivid dreams. These side effects are most common when starting the medication or increasing the dose, and they often subside after a few weeks. If your parent suddenly stops eating or complains of stomach pain after starting Aricept, report this to the prescribing doctor — dose adjustment may help.

Memantine (Namenda)

Memantine works differently from cholinesterase inhibitors. It regulates glutamate, another brain chemical involved in learning and memory. It is typically prescribed for moderate to severe Alzheimer's, sometimes in combination with donepezil.

What it does: Like the cholinesterase inhibitors, memantine may slow the worsening of symptoms. Some caregivers report that their parent seems more alert or more engaged after starting memantine, though the effect varies widely.

Common side effects: Dizziness, headache, constipation, and confusion. The irony of a dementia medication causing confusion is not lost on caregivers — if your parent seems worse after starting memantine, tell the doctor immediately.

Medications that can make dementia worse

This is where caregiver awareness becomes critically important. Several common medications — some of which your parent may have been taking for years — can worsen cognitive function in people with dementia.

Anticholinergic medications

These are the most significant concern. Anticholinergic drugs work by blocking acetylcholine — the exact opposite of what dementia medications are trying to do. Taking a cholinesterase inhibitor and an anticholinergic simultaneously is like pressing the gas and brake pedals at the same time.

Anticholinergic medications include some very common drugs:

• Diphenhydramine (Benadryl) — found in many OTC sleep aids and allergy medications
• Oxybutynin (Ditropan) — for overactive bladder
• Certain older antidepressants (amitriptyline, nortriptyline)
• Some medications for nausea and motion sickness

If your parent with dementia is taking any of these, bring it to the doctor's attention. Alternatives usually exist. The Beers Criteria list identifies many medications that are potentially inappropriate for older adults, with anticholinergics flagged as especially problematic for anyone with cognitive impairment.

Benzodiazepines

Medications like lorazepam (Ativan), diazepam (Valium), and alprazolam (Xanax) are sometimes prescribed for anxiety or agitation in dementia patients. While they may calm acute distress, they also increase fall risk, worsen confusion, and can paradoxically increase agitation in some patients. Their use in dementia should be a last resort, at the lowest dose, for the shortest time.

Sedating medications

Any medication that causes drowsiness — certain pain medications, muscle relaxants, some blood pressure drugs — compounds the cognitive impairment already present in dementia. If your parent seems significantly more confused or sleepy after a medication change, the new drug may be the cause.

Managing medications for a parent with dementia

Dementia adds a layer of complexity to medication management that goes beyond what most families anticipate.

The trust problem

As dementia progresses, many patients develop suspicion about their medications. They may believe the pills are poisoning them, refuse to take them, hide them, or spit them out when the caregiver turns away. This is not stubbornness — it is a symptom of the disease. Paranoia and delusions are common in moderate to advanced dementia.

Strategies that help: offering medication with food, using a calm and matter-of-fact tone, not arguing about whether the pills are "poison," and asking the doctor about liquid or dissolvable formulations if swallowing pills becomes a battleground.

The supervision requirement

A parent with dementia should not self-administer medications. Even if they seem capable, cognitive impairment makes it unsafe. Double-dosing, skipping doses, taking the wrong pills from the cabinet, and confusing old bottles with current prescriptions are all common.

A locked automatic pill dispenser can help for mild to moderate dementia. For more advanced cases, a caregiver or aide needs to physically hand the pills to the patient and watch them swallow.

The documentation imperative

When your parent cannot reliably report their own symptoms, the caregiver's observations become the doctor's primary data source. Keep a daily log of medication administration, any side effects observed (nausea, dizziness, increased confusion, behavioral changes), and general patterns (better in the morning, worse after the evening dose).

The Medication Management Kit includes daily tracking sheets with space for side effect notes, a master medication list formatted for doctor visits, and a section specifically for documenting behavioral changes — the kind of information that helps a neurologist make better prescribing decisions. At $14, it is designed for exactly this situation: a caregiver who has become the de facto medical case manager.

Questions to ask the doctor

When your parent is prescribed a dementia medication, these questions will give you the practical information the doctor may not volunteer:

1. What should I realistically expect this medication to do?
2. How long before we should see an effect — and how will I know if it is working?
3. What side effects should I watch for in the first two weeks?
4. Does this interact with anything else my parent is currently taking?
5. Are there any over-the-counter medications or supplements my parent should stop taking?
6. What is the plan if this medication does not help or causes problems?

Write the answers down. You will not remember them all when you get home.

Related reading:

• 20 Drugs Seniors Should Not Take — The Beers Criteria Explained
• Polypharmacy in the Elderly — When Too Many Medications Become Dangerous
• Elderly Medication Management — The Complete Guide