It's important to understand the difference between Alzheimer's disease and dementia. Dementia is not a specific diagnosis; it's an umbrella term used to describe cognitive problems. It can take some time to get a specific diagnosis for Alzheimer's disease. Symptoms may seem to appear gradually and many people may delay visiting their GP. When a person does seek help, their GP will need to rule out other possible causes of memory loss.
There are four different types of drugs available to help manage symptoms of Alzheimer's disease. These include Donepezil (Aricept), Rivastigimine (Exelon), Galantamine (Reminyl) and Memantine (Ebixa or Axura). The first three work by boosting levels of the chemical messenger acetylcholine inside the brain, improving communication between nerve cells. Memantine is usually prescribed for those with severe Alzheimer's disease and regulates the activity of Glutamate, a chemical messenger involved in brain function that is released in excess when brain cells are damaged.
During the early stages of Alzheimer's disease, a person may be able to live fairly independently. However, it is a progressive condition, so symptoms will get worse and a person will need more assistance coping with daily life. Eventually, they will reach a stage where it is not safe for them to be on their own.