How can we efficiently treat elderly persons suffering from depression and dementia?

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I appreciate your quick and helpful answer.

Dementia is a syndrome resulting from progressive decline in intellectual capacity of the individual. It is characterized by loss of ability to memorize, to solve the problems of everyday life, which interferes with your relationships and social and professional activities. The goal of treatment is to control the symptoms of dementia. The treatment depends on the disease that is causing the dementia. Some people need to be hospitalized for a short period.
Interrupting or changing medications that worsen confusion can improve brain function
Increasingly, evidence points to the benefits that some types of mental exercises can bring to improve dementia
Depression is a disease state. Depression causes symptoms such as depression and lack of interest in any activity. It is a disorder that can come with or without the feeling of sadness and undermines the psychological, social and work functioning
Treatment of depression is substantially medicated. There are 30 available antidepressants. Contrary to what some fear, these medications are not like drugs, leaving the jubilant person and cause addiction. Treatment is simple and, in general , does not disqualify or numbs the patient.