A neurotransmitter imbalance between acetylcholine and dopamine explains delirium symptoms. A dopamine excess has various consequences: hallucinations that are present in 51 %, and delusions, present in up to 43% in hypoactive delirium. These symptoms produce acute stress in patients and caregivers. It is reported that 53.5% of patients recalled the episode of delirium and from these, 55% of them recalled it associated to hallucinations and 95% of them to delusions. Family recalled the event as stressful in 66%, nurses in 65% of those who did not have hallucinations and in 88% of those who had (6).