Dementia and Alzheimer’s Medications: What They Do and Do Statins Affect Your Risk?

Two drug classes make up most of dementia pharmacology, and neither one is a cure, a fact worth stating plainly before anything else. This guide covers what these medications actually do, how treatment differs by dementia type, and two questions that generate more confusion than almost anything else in this space: whether statins raise or lower dementia risk, and whether natural remedies can do what medication cannot.

What Dementia Medications Actually Do

Two drug classes make up dementia pharmacology.

• Donepezil (Aricept), a cholinesterase inhibitor that raises acetylcholine levels, a brain chemical involved in memory and attention that runs low as Alzheimer’s progresses; approved for mild, moderate, and severe disease, with rivastigmine and galantamine as other drugs in the same class

• Memantine (Namenda), which works differently, blocking excess glutamate signaling that damages neurons over time; generally reserved for moderate to severe disease

Both classes are approved specifically for Alzheimer’s, and both are symptomatic treatments: they can ease memory and thinking problems for a period, but they do not stop, slow, or reverse the underlying disease process. Combining the two classes is common in moderate to severe disease and modestly outperforms either alone, though it means managing two prescriptions and two sets of potential side effects rather than one.

Read More: Neurological / Cognitive / Seizure Disorders: Symptoms, Causes, Diagnosis, and Treatment

How the Right Medication Gets Chosen

No single test tells a doctor which drug to prescribe. The decision rests on which dementia type is present, since that determines whether a drug is on-label or off-label; how far the disease has progressed, since donepezil and memantine are approved for different stages; and other health conditions, including heart rhythm problems and stomach ulcers, which can rule out cholinesterase inhibitors specifically, since they can slow the heart rate and cause fainting or stomach bleeding. Getting an accurate type diagnosis before starting medication, rather than after, avoids months spent on a drug unlikely to help.

Treatment Differs by Type

Cholinesterase inhibitors are also used off-label for other dementia types, though effectiveness and evidence quality vary considerably by type.

Lewy Body Dementia

Cholinesterase inhibitors are first-line treatment here too, and some evidence suggests people with Lewy body dementia respond even better to them than people with Alzheimer’s do. Rivastigmine is FDA-approved for dementia associated with Parkinson’s disease, a closely related condition. Memantine may help in some cases, though the evidence is less consistent. The critical caveat, covered in more depth in our article comparing dementia types, is that antipsychotic medications carry a serious risk in this population specifically and are used only with extreme caution.

Vascular Dementia

No medication is specifically approved for vascular dementia. Treatment centers on managing the underlying vascular risk factors, blood pressure, diabetes, and cholesterol, to slow further damage. Cholinesterase inhibitors are sometimes used off-label and show modest benefit in some studies, but the evidence is weaker and less consistent than for Alzheimer’s.

Do Statins Affect Dementia Risk?

This is the most searched, most misunderstood question in this space, and the honest answer runs opposite to the common assumption. In 2012, the FDA added a label warning about rare, reversible memory fog and confusion linked to statins, symptoms that resolved after stopping the drug. That warning is where the fear largely originated, and it has since been widely misread as a warning about dementia itself, a different and far more serious condition.

The actual research points the other way. The largest meta-analysis to date, published in 2025 and covering 55 studies and more than 7 million patients, found statin use associated with a 14 percent lower risk of dementia overall and a larger reduction specifically for Alzheimer’s disease. Multiple other large meta-analyses from several years ago report similar reductions.

Statins are not prescribed as a dementia treatment and should not be started for that reason alone, but the fear that they cause it is not supported by the weight of current evidence, and stopping a prescribed statin over this concern is generally not advisable without discussing it first.

Two Honest Answers

Does Gabapentin Cause Dementia?

This one is genuinely unsettled, and the honest answer is that the evidence conflicts. A 2024 Taiwanese cohort of over 300,000 patients found no meaningful increase in dementia risk with gabapentin use. But a 2025 study of more than 26,000 adults prescribed gabapentin for chronic back pain found a dose-dependent increase in both dementia and mild cognitive impairment, strongest in adults under 65.

Do Natural Remedies Help?

Not according to the evidence, despite how widely they are marketed. NIH-funded research has tested ginkgo biloba, vitamin E, and omega-3 supplements specifically for Alzheimer’s prevention and treatment, and none showed a convincing benefit in well-designed trials. Ginkgo, in particular, has been tested in a large, dedicated prevention trial and did not reduce dementia incidence. A generally healthy diet supports overall brain health, but no supplement currently available has been shown to meaningfully change the course of the disease.

Where to Start

Ask specifically which category a proposed medication falls into: symptomatic treatment, off-label use for a non-Alzheimer’s type, or something to manage a separate risk factor like blood pressure. That distinction shapes what to expect, since none of the drugs discussed in this article currently reverse the underlying disease.

If a cholinesterase inhibitor or memantine has just been started, expect a real but measured effect, and give it time before deciding whether it is working. Report side effects rather than stopping abruptly on your own, since some, including gastrointestinal symptoms with cholinesterase inhibitors, ease with time or a dose adjustment.

Read More: Neurological / Cognitive / Seizure Disorders: Symptoms, Causes, Diagnosis, and Treatment