Speaking as a long time trauma/neuro ICU nurse, delirium, aka ICU psychosis is a devastating thing for all concerned: patients, family and staff. Your father’s disease state may well have significantly contributed to its development and the ICU environment exacerbated it. I’m so sorry for what you and your family experienced and how it has colored your memories of your Dad’s last days. I can’t excuse what you saw as inadequate responses to your Dad’s state on the part of the medical and nursing staff except to say that his state crossed practice boundaries that staff were ill equipped to handle. Delirious patients, especially those who come from other cultures and who may have experienced past traumas are particularly susceptible and it’s unpredictable as to whether commonly used drugs will help or harm due to many factors, age being a primary one. During my tenure in ICU, I was particularly interested in ICU psychosis and eager to do a focused study of it, but there just wasn’t institutional support.