DEAR DOCTOR K: My wife is in her late 70s. Lately she appears very tired and agitated in the evenings. I talked to a doctor friend who said she might be "sundowning." What is sundowning, and what can we do about it?
DEAR READER: Some older people have trouble concentrating, grow agitated or even confused, and become especially fatigued at the end of the day. This phenomenon is known as "sundowning" because its effects tend to coincide with sunset -- usually occurring in the late afternoon into the evening, then settling down late at night.