my sister is dx with dementia with mri. taking risperidone .5 mg. 2x/day she continues to be with continuous mood swings, accusing people of stealing her belongings, afraid to be alone, psychotic at times. Visual hallucinations. Her doctor just started her on memenda, she is refusing other diagnostic tests; e.g. pet scan She is a danger to herself and others, we are so concerned....... YYYY@YYYY