This report delves into the critical role of nursing leadership in dementia care, addressing the global concern of providing quality care to patients. It highlights the importance of nursing science in observing, describing, and intervening in health/disease processes, particularly in the context of dementia. The report discusses non-pharmacological interventions for managing behavioral and psychological symptoms of dementia (BPSD), including anxiety, agitation, and depression. It emphasizes the significance of trained medical practitioners, especially in psychiatry, for managing complex cases. The report also touches upon the defiant negativist disorder and its diagnostic criteria, distinguishing between interdependent and independent nursing activities, and referencing key publications in the field. The overall focus is on improving patient outcomes through effective leadership and evidence-based practices.