The following NICE guidance might be helpful perhaps: https://www.nice.org.uk/guidance/cg42/chapter/1-guidance#interventions-for-non-cognitive-symptoms-and-behaviour-that-challenges-in-people-with-dementia
Have you looked at the literature on non-pharmacological treatments for behavioural symptoms in dementia? There have been many interventions involving education, support groups, carer management skills, and adaptations to the home which may cause some behav. problems.