When someone is diagnosed with dementia, it can be a lot to take in. While there's no cure yet, there are FDA-approved dementia medications that can help manage symptoms and, in some cases, even slow down the disease's progression. It's a complex area, and figuring out the right treatment plan often involves talking with doctors who know these medications well.
This article looks at some of the main types of dementia medications available and what they do.
In Brief
Current dementia medications can help manage symptoms like memory loss and confusion, and some newer ones target the underlying disease process.
Cholinesterase inhibitors work by increasing a brain chemical called acetylcholine, which helps nerve cells communicate.
Memantine, a glutamate regulator, helps the brain process information by managing another brain chemical.
Newer Alzheimer's medications, like lecanemab (Leqembi) and donanemab (Kisunla), aim to remove amyloid plaques from the brain.
These amyloid-targeting drugs are for early stages of Alzheimer's and can modestly slow down cognitive decline.
Medications like brexpiprazole (Rexulti) are approved to help with agitation associated with Alzheimer's dementia.
FDA-Approved Medications for Alzheimer's Disease
The U.S. Food and Drug Administration (FDA) has approved several medications that can help manage symptoms or target the underlying disease process. These treatments are typically considered alongside non-drug approaches, and it's important to discuss them with a healthcare professional experienced in their use.
Cholinesterase Inhibitors
These medications work by increasing the levels of a chemical messenger in the brain called acetylcholine. Acetylcholine plays a role in memory and thinking.
By preventing its breakdown, these drugs can help improve communication between nerve cells. They are generally prescribed for mild to moderate Alzheimer's disease.
Donepezil (Aricept): Approved for mild to severe Alzheimer's disease.
Rivastigmine (Exelon): Approved for mild to moderate Alzheimer's disease and also for dementia related to Parkinson's disease.
Galantamine (Razadyne): Approved for mild to moderate Alzheimer's disease.
Common side effects of these medications can include nausea, vomiting, diarrhea, dizziness, headache, and loss of appetite.
NMDA Receptor Antagonists
This class of medication works differently by regulating another brain chemical called glutamate. Glutamate is involved in how the brain processes information. This type of drug is typically used for moderate to severe Alzheimer's disease.
Memantine (Namenda): Approved for moderate to severe Alzheimer's disease. It can be used alone or in combination with a cholinesterase inhibitor.
Potential side effects may include headache, constipation, confusion, and dizziness.
Newer Alzheimer's Medications Targeting Amyloid
More recently, the FDA has approved medications that aim to affect the underlying biology of Alzheimer's disease, specifically by targeting amyloid plaques in the brain. These treatments are generally for individuals in the earlier stages of the disease (mild cognitive impairment or mild dementia due to Alzheimer's).
Aducanumab (Aduhelm): This medication targets beta-amyloid plaques. Its use requires careful monitoring.
Lecanemab (Leqembi): Another treatment that targets beta-amyloid. Like aducanumab, it is intended for early-stage Alzheimer's and requires monitoring for potential side effects.
These newer therapies can have side effects, including infusion-related reactions and a condition called ARIA (amyloid-related imaging abnormalities), which involves swelling or bleeding in the brain. Regular medical monitoring is necessary when taking these medications.
Medications for Other Types of Dementia
While Alzheimer's disease is the most common form of dementia, other types exist, such as vascular dementia, Lewy body dementia, and frontotemporal dementia. Treatment for these conditions often focuses on managing symptoms, as specific FDA-approved medications targeting the underlying pathology of each distinct dementia type are limited.
For behavioral and psychological symptoms that can accompany various dementias, such as agitation, hallucinations, or sleep disturbances, healthcare providers may consider medications. It is generally advised to explore non-drug strategies first to manage these symptoms. When medication is deemed necessary, options might include:
Atypical antipsychotics: These medications can be used to manage agitation associated with dementia. However, it is important to note that all atypical antipsychotics carry a warning regarding an increased risk of death in older adults with dementia-related psychosis. One such medication, brexpiprazole (Rexulti®), is specifically approved for agitation associated with Alzheimer's dementia.
Orexin receptor antagonists: For people experiencing insomnia, certain medications in this class may be prescribed. Suvorexant (Belsomra®) is one example that has been studied in people with mild to moderate Alzheimer's disease.
It is important for patients and caregivers to have open discussions with their healthcare providers about all current medications, supplements, and brain conditions to avoid potential interactions and ensure safe use.
Looking Ahead with Dementia Medications
So, we've talked about the medications available for Alzheimer's. It's important to remember that right now, none of them can actually cure the disease. But, there are a couple of FDA-approved drugs that work on the underlying issues, which may result in improved brain health.
Then there are other medicines that can help manage some of the symptoms, like memory problems or confusion. Neuroscience research is always ongoing, and clinical trials are a big part of finding new and better options down the road.
Frequently Asked Questions
What are the main goals of FDA-approved dementia medications?
Currently, there are no cures for dementia, including Alzheimer's disease. However, FDA-approved medications aim to either slow down the disease's progression by targeting its underlying causes or help manage some of the symptoms, like memory loss and confusion, for a period of time.
How do cholinesterase inhibitors work?
Cholinesterase inhibitors help boost the levels of a brain chemical called acetylcholine. This chemical is important for memory and thinking. By preventing acetylcholine from breaking down too quickly, these medications can help nerve cells communicate better, which may temporarily improve memory and thinking symptoms.
What is the role of NMDA receptor antagonists like memantine?
Memantine, an NMDA receptor antagonist, works by controlling the activity of another brain chemical called glutamate. Glutamate plays a role in how the brain processes information. By regulating glutamate, memantine can help improve memory, attention, and the ability to perform daily tasks in people with moderate to severe Alzheimer's.
What are the newer Alzheimer's medications that target amyloid?
Newer medications, such as lecanemab (Leqembi) and donanemab (Kisunla), are designed to target and remove a protein called beta-amyloid from the brain. This protein builds up in the brains of people with Alzheimer's. These treatments are for early stages of the disease and aim to slow down the worsening of memory and thinking problems.
Are there FDA-approved medications for agitation in dementia?
Yes, brexpiprazole (Rexulti) is an FDA-approved medication specifically to treat agitation that can occur with dementia due to Alzheimer's disease. It's important to note that non-drug approaches should be tried first to manage behaviors like agitation.
Can medications cure Alzheimer's disease?
No, currently, there are no FDA-approved medications that can cure Alzheimer's disease. The available treatments are designed to help manage symptoms or slow the progression of the disease.
What are the common side effects of cholinesterase inhibitors?
Some common side effects of cholinesterase inhibitors can include nausea, vomiting, diarrhea, loss of appetite, and dizziness. These effects are usually mild and can often be managed.
What are the potential serious side effects of amyloid-targeting drugs?
Amyloid-targeting drugs like lecanemab and donanemab can have serious side effects, including brain swelling or small bleeds, known as ARIA. Symptoms can include headaches, confusion, dizziness, vision changes, or even stroke-like symptoms. Close monitoring by a healthcare professional is essential.
Are there medications for sleep problems in people with dementia?
While not specifically for dementia itself, suvorexant (Belsomra) is an FDA-approved medication for insomnia that has been found to be effective in some individuals with mild to moderate Alzheimer's disease. It works by affecting sleep-wake cycles in the brain.
What is the difference between drugs that treat symptoms and drugs that change disease progression?
Drugs that treat symptoms, like cholinesterase inhibitors, help manage issues such as memory loss and confusion for a while. Drugs that change disease progression, like amyloid-targeting therapies, aim to affect the underlying biological processes of the disease to slow its advancement.
How important is it to talk to a doctor before starting dementia medication?
It is extremely important to discuss any potential treatment with a healthcare professional. They can help determine if a medication is appropriate for an individual's specific condition and stage of dementia, and they will monitor the patient closely to ensure the medication is used safely and effectively.
Are there medications approved for types of dementia other than Alzheimer's?
While many medications are specifically approved for Alzheimer's disease, some, like rivastigmine (Exelon), are also approved for dementia related to Parkinson's disease. Research is ongoing for other types of dementia, and doctors may sometimes use medications 'off-label' based on symptoms.
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