Blood work and brain scans can help show if there is a treatable cause of the decline in brain function. It is especially important to rule out major depression, a treatable condition that can cause symptoms similar to Alzheimer's. There is no cure. The goal of treatment is to preserve mental and physical function as much and as long as possible. The best approach seems to include control of other illnesses, a healthy diet, regular exercise, and suitable activities.
Medication is sometimes helpful.
Both of these drugs are costly and have side effects. Many people who have Alzheimer's are depressed, especially in the earlier stages. Most do not show sadness so much as a loss of pleasure and joy in life. When depression occurs in late stages of Alzheimer's, the person may be hostile or agitated and may often refuse food and drink. Depression makes brain function much worse than it otherwise would be.