Medical Dictionary

sundowning

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noun sun·down·ing \ ˈsən-ˌdau̇n-iŋ \

medical Definition of sundowning

:a state of increased agitation, confusion, disorientation, and anxiety that typically occurs in the late afternoon or evening in some individuals affected with dementia
  • Sundowning is a major problem in the middle and late stages of disorders, such as Alzheimer's disease, that cause dementia.
  • —Patricia N. Prinz et al.The New England Journal of Medicine23 Aug. 1990

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