Alzheimer's disease generally progresses through three stages: mild, moderate and severe. People experience the three stages at different rates, and there can be an overlap in symptoms from one stage to another.
Stage 1: Mild Alzheimer's Disease
The mild stage of Alzheimer's Disease can last from 2 to 4 years or longer. Those in this phase of the disease may:
People with mild Alzheimer's Disease are usually alert, sociable, and enjoy life, but their forgetfulness interferes with daily living and may frustrate them. This frustration may lead them to feel overly emotional, irritable or apathetic.
Stage 2: Moderate Alzheimer's Disease
The moderate stage of Alzheimer's Disease is often the longest, lasting from 2 to 10 years. In this stage, a person may:
People with moderate Alzheimer's Disease often require close supervision and support services such as home care may become necessary.
Stage 3: Severe Alzheimer's Disease
The severe stage can last from 1 to 3 years or longer. People with severe Alzheimer's Disease cannot do things on their own anymore. They may not be able to:
People with severe Alzheimer's disease usually require constant care.