sundown syndrome
A pattern of increased confusion, agitation, and behavioral symptoms that occur in the late afternoon or evening in patients with dementia.
Full Definition
Sundown syndrome, also called sundowning, refers to a phenomenon observed in many patients with dementia where behavioral and psychological symptoms worsen during the late afternoon, evening, or night hours. Symptoms may include increased confusion, agitation, anxiety, aggression, pacing, and disorientation. The exact cause is unclear but may relate to disrupted circadian rhythms, fatigue, reduced lighting, or changes in the caregiving environment. Management typically involves maintaining consistent routines, optimizing lighting, and sometimes medication adjustments.
Usage
Usage note: Preferred term is 'sundown syndrome' rather than the informal 'sundowning' in clinical documentation.
In Context
- "The family reported that sundown syndrome symptoms typically begin around 4 PM and persist until bedtime." — Clinical history
- "Behavioral interventions for sundown syndrome include maintaining consistent lighting and reducing environmental stimulation in the evening." — Care plan documentation