Alzheimer's disease

Also called Alzheimer disease or Alzheimer’s dementia

Alzheimer's disease is a progressive brain condition and the most common cause of dementia. Proteins build up in the brain and nerve cells are gradually lost. It usually starts with memory problems and slowly affects thinking, language and the ability to manage daily life.

Last updated Nov 9, 2026

What it is

The biggest risk factor is age, and it is more common in people over 65. Family history, heart and blood vessel health and hearing loss also play a part.

There is no cure yet, but medicines can help some symptoms for a time. Support for the person and their carers, planning ahead and staying active matter a great deal.

Common signs

  • Forgetting recent conversations or events, repeating questions
  • Getting lost in familiar places
  • Difficulty finding words, planning or making decisions
  • Changes in mood or behaviour

How it is usually diagnosed

  • Memory and thinking tests at a memory clinic
  • Blood tests to rule out other causes, such as thyroid or vitamin B12 problems
  • A brain scan (CT or MRI), and sometimes specialist tests

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Memory clinic reports and test scores over time
  • Brain scan reports
  • A current list of medicines
  • Care plans, legal documents such as power of attorney, and contacts for carers

Questions to ask your doctor

  • Which type of dementia is it, and how is it likely to progress?
  • Are there medicines that could help?
  • What support is available for the family and carers?
  • What should we plan for now, while decisions can be shared?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Sudden confusion or a sudden change in behaviour (it may be an infection or another illness)
  • Signs of a stroke: face drooping, arm weakness, slurred speech
  • A fall with a head injury

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

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