Is There a Cure for Dementia? What Treatments, New Drugs and Prevention Can Do

When a parent starts forgetting names, repeating questions or getting lost on familiar roads, families often ask the same thing first: is there a cure? The honest answer is more nuanced than “yes” or “no”. Most dementias cannot yet be cured, but some causes of memory loss can be treated or even reversed, new drugs for early Alzheimer’s disease are now available in India, and a great deal can be done to slow decline and improve quality of life.This guide explains what dementia is, which forms can and can’t be cured, what current treatments do, what the new Alzheimer’s drugs can and cannot offer, how to reduce risk, and how families can cope. It is general information, not medical advice or a diagnosis.

In short

• There is no cure for most dementias, including Alzheimer’s disease. Nothing available today restores lost brain function.
• Some conditions that look like dementia are treatable or reversible, such as vitamin B12 deficiency, thyroid problems, depression, medicine side effects and alcohol-related damage caught early. This is why every memory problem deserves a medical check.
• Medicines can ease symptoms for a time, and newer antibody drugs for early Alzheimer’s disease can modestly slow decline in selected patients. They are not cures, and come with risks, monitoring needs and high costs.
• Care, routine, safety and support make a real difference to the person and the family.
• Around four in ten cases may be preventable or delayed by managing risk factors such as blood pressure, hearing loss, inactivity, smoking and heavy drinking.

What is dementia?

Dementia is not a single disease. It is a group of symptoms caused by damage to the brain, including problems with memory, thinking, language, judgement and behaviour that are severe enough to interfere with daily life. It is not a normal part of ageing, although the risk rises with age. In India, estimates suggest that millions of people over 60 live with dementia, and numbers are rising as the population ages.

Types of dementia and whether they can be cured

Type	What it is	Can it be cured?
Alzheimer’s disease	The most common cause, usually beginning with problems remembering recent events	No cure. Medicines may ease symptoms, and newer drugs can slow decline in early disease for selected patients.
Vascular dementia	Caused by strokes or damage to small blood vessels in the brain	No cure, but controlling blood pressure, diabetes, cholesterol and smoking can slow or prevent further damage
Lewy body dementia	Memory and thinking problems with vivid hallucinations, movement changes and fluctuating alertness	No cure. Symptoms can be treated, and some medicines need special care.
Frontotemporal dementia	Changes in personality, behaviour or language, often at a younger age	No cure. Care focuses on behaviour, safety and support.
Mixed dementia	More than one type together, common in older adults	No cure. Treatment targets the contributing causes.
Alcohol-related dementia and Wernicke-Korsakoff syndrome	Brain damage from long-term heavy drinking and thiamine (vitamin B1) deficiency	Partly improvable if caught early. Stopping alcohol and treatment with thiamine and good nutrition can help, but advanced damage may be permanent.

Conditions that look like dementia but may be treatable

Not every memory problem is dementia, and some causes can be improved or reversed. This is a strong reason to see a doctor early.

Cause	What helps
Vitamin B12 deficiency or other nutritional problems	Testing and supplementation, as advised by a doctor
Thyroid disease	Treating the thyroid problem
Depression	Treatment of depression can improve concentration and memory. See is depression a mental disorder
Medicine side effects	Reviewing and adjusting medicines, especially sedatives and sleeping tablets, with a doctor
Infections and delirium	Treating the infection or underlying illness. Sudden confusion needs urgent medical attention.
Normal pressure hydrocephalus, brain tumours, or bleeding around the brain after a fall	Specialist treatment, sometimes surgery
Sleep problems such as sleep apnoea	Treating the sleep disorder. See types of sleep disorders
Heavy alcohol or drug use	Stopping use, with medical supervision where needed. See how to detox your body from alcohol
Hearing or vision loss	Hearing aids and eye care, which can reduce confusion and risk

What treatments are available today?

Approach	What it does
Cholinesterase inhibitors (such as donepezil, rivastigmine and galantamine)	May ease memory and thinking symptoms or slow their worsening for a time in some people with mild to moderate Alzheimer’s disease and some other dementias. They do not stop the underlying disease.
Memantine	May help with moderate to severe Alzheimer’s disease, alone or with other medicines
Anti-amyloid antibody drugs	A new class for early Alzheimer’s disease. See the next section.
Treating mood, sleep and behaviour changes	Care first through routine, environment and communication. Medicines are used carefully, because some, especially certain sedatives and antipsychotics, carry risks in older adults.
Non-drug approaches	Structured routine, physical activity, cognitive stimulation, music and reminiscence, social contact, occupational therapy and a safe, familiar home
Treating other health conditions	Controlling blood pressure, diabetes, heart disease, hearing and vision problems, and sleep apnoea
Support for caregivers	Training, counselling, respite and community groups

All medicines must be prescribed and monitored by a doctor. Don’t start, stop or change them without advice.

New Alzheimer’s drugs: hope, with limits

In recent years, antibody medicines that remove amyloid, a protein that builds up in the brain in Alzheimer’s disease, have been developed. Two of them, lecanemab and donanemab, have been approved by India’s drug regulator, the CDSCO, for adults in the early symptomatic stages of Alzheimer’s disease, meaning mild cognitive impairment or mild dementia with confirmed amyloid in the brain. They are given by intravenous infusion, and have been reported to be launched in India.It is important to be realistic:

• They are not cures. In trials, they modestly slowed decline in early disease. They don’t reverse damage that has already happened or restore memory.
• They are only for early Alzheimer’s disease, not for other types of dementia, and not for advanced stages.
• Confirmation is needed. Eligibility depends on a specialist assessment, evidence of amyloid in the brain through a scan or fluid test, and, in some cases, genetic testing.
• There are risks. They can cause brain swelling or small bleeds, known as ARIA, so regular MRI scans and careful monitoring are needed. Risk varies from person to person.
• Cost and access are major barriers. Treatment is expensive, requires infusion visits and specialist centres, and the required diagnostic tests aren’t widely available outside big cities.

If you wonder whether these drugs could suit someone in your family, ask a neurologist or geriatric specialist. Early diagnosis matters, because the window for these treatments is limited. This is a fast-moving area, so check current guidance with your specialist.

Can dementia be prevented or delayed?

Dementia is not entirely preventable, but research, including the Lancet Commission on dementia prevention, suggests that a large share of cases, possibly around 45%, may be linked to modifiable risk factors. You can lower risk, at any age, by:

• Controlling blood pressure, diabetes and cholesterol
• Treating hearing loss and keeping vision checked
• Staying physically active. See exercise for mental health
• Not smoking, and limiting exposure to air pollution where possible
• Limiting alcohol. Heavy drinking is a risk factor for dementia and brain damage. See is binge drinking bad
• Staying socially active and mentally engaged
• Protecting your head from injuries, such as with helmets and fall prevention
• Treating depression and getting enough sleep
• Keeping a healthy weight and diet, and staying in education or learning throughout life

For everyday habits that protect mind and mood, see how to stay mentally healthy.

Early signs: when to see a doctor

• Forgetting recent conversations, appointments or events, and repeating questions
• Getting lost in familiar places
• Trouble managing money, bills or medicines
• Difficulty finding words, or following conversations
• Misplacing things in odd places
• Changes in mood, personality, judgement or behaviour
• Withdrawing from hobbies and social life
• Confusion about time or place

Occasional forgetfulness is normal. Please see a doctor if changes are persistent, getting worse or affecting daily life. Early assessment finds treatable causes, allows treatment to start sooner and gives families time to plan.

How is dementia diagnosed?

1. A history from the person and a close family member
2. Cognitive tests, such as the MMSE or MoCA
3. Blood tests to check for B12 deficiency, thyroid problems, infections and other causes
4. Brain imaging, such as CT or MRI, and in some cases specialised scans or fluid tests
5. A review of medicines, mood, sleep, hearing, vision and alcohol use
6. Specialist assessment by a neurologist, geriatrician or geriatric psychiatrist where needed

Living well with dementia, and caring for someone

• Keep routines steady. Familiar schedules reduce anxiety.
• Communicate simply. Speak calmly, one idea at a time, and avoid arguing about facts.
• Make the home safe. Reduce fall risks, secure the stove and medicines, and plan for wandering, for example with ID and a contact number.
• Stay active and connected. Walks, music, familiar tasks and time with family help.
• Plan ahead early. While the person can still take part, discuss legal and financial matters, such as a will and who will manage money, and their wishes for care.
• Review driving safety with a doctor.
• Look after the caregiver. Caring is tiring and emotional. Sharing responsibilities, respite breaks, counselling and support groups matter, and organisations such as the Alzheimer’s and Related Disorders Society of India (ARDSI) offer information and community.

Practical tips for India

• “It’s just old age.” Memory loss is often brushed off, which delays diagnosis. Persistent changes deserve a medical check.
• Specialist access. Memory clinics, neurologists and geriatric specialists are mostly in larger cities. Your family doctor can refer you, and teleconsultations can help.
• Joint family caregiving. Care often falls on one person, usually a woman. Agree on shared roles early.
• Costs. Long-term care is expensive. Check what government services, insurance and employer cover can offer.
• Stigma and “log kya kahenge.” Dementia is a medical condition, not a family shame, and support is available.
• Free support. Tele-MANAS (14416) offers free tele-mental-health support, including for stressed caregivers.

When to get urgent help

Call 112 or go to the nearest hospital if:

• Confusion comes on suddenly, which may signal infection, stroke or another emergency
• There are signs of stroke: face drooping, arm weakness or slurred speech
• The person has had a head injury or fall
• They are lost, missing or in danger
• They, or you, are thinking about ending life or harming someone

In India, Tele-MANAS (14416) is a free national helpline for mental health support.

Alcohol, substances and memory problems

Long-term heavy drinking can damage the brain and cause memory loss, confusion and difficulty planning, sometimes called alcohol-related brain damage or Wernicke-Korsakoff syndrome. Some sedatives and sleeping tablets, and drug use, can also worsen memory. The earlier alcohol is stopped, the better the chance of some recovery, and stopping should be done with medical supervision if drinking has been heavy and daily, because withdrawal can be dangerous. See how to come out of addiction and dual diagnosis.

Special situations

Depression or anxiety with memory problems. They are common in older adults, can mimic dementia and can occur together. See is anxiety a psychological disorder.Young-onset dementia. Dementia can affect people under 65. Look for treatable causes and seek specialist care.Sleep and behaviour changes. Restlessness at night and agitation are common and often have treatable triggers, such as pain, infection or medicines.Caregiver stress. Burnout, low mood and anxiety are common. See how to deal with trauma and consider counselling.

How Thamarai can help

Thamarai Healing Center in Pollachi doesn’t replace a neurologist or memory clinic, but memory and thinking problems often involve mental health, alcohol or drug use, sleep and stress. Our mental health program offers confidential assessment and guidance, support for depression, anxiety and substance use, and support for families, in a calm setting among the foothills of the Western Ghats.If you are worried about a loved one, a confidential conversation can help you decide the next step. Speak to our team confidentially →

Frequently asked questions

This article is for general information and isn’t a substitute for professional medical advice, diagnosis or treatment. Information about new treatments changes quickly, so check with your specialist.

Sources

• World Health Organization. Dementia fact sheet.
• Livingston G, et al. Dementia prevention, intervention, and care: 2024 report of the Lancet standing Commission. The Lancet, 2024.
• van Dyck CH, et al. Lecanemab in early Alzheimer’s disease. New England Journal of Medicine, 2023.
• Sims JR, et al. Donanemab in early symptomatic Alzheimer disease: the TRAILBLAZER-ALZ 2 randomized clinical trial. JAMA, 2023.
• National Institute for Health and Care Excellence (NICE). Dementia: assessment, management and support for people living with dementia and their carers (NG97). 2018.
• Central Drugs Standard Control Organization (CDSCO), India. Marketing authorisations for donanemab and lecanemab (as reported in 2025 and 2026).
• Longitudinal Ageing Study in India, Diagnostic Assessment of Dementia (LASI-DAD). Alzheimer’s and Related Disorders Society of India (ARDSI).
• Ministry of Health and Family Welfare, Government of India. Tele-MANAS (14416).