Sometimes a person settles well into hospice care, has a relatively peaceful month, and then the nights change. Someone who was quiet a moment ago asks to be sat up, then laid back down, over and over. They tug at the IV line or feeding tube. By daylight they may converse almost normally. Families sitting up through these nights often ask themselves whether the end is close. What they are seeing may be what clinicians call delirium.
Delirium is a relatively sudden, whole-brain disturbance. Its hallmark is fluctuation: attention drifts and the level of alertness rises and falls within a single day, often worsening at night. That pattern is what distinguishes it from dementia, which begins gradually and does not swing so sharply hour to hour. Delirium can also occur on top of pre-existing cognitive impairment.
Near the end of life, delirium is common because the causes usually stack. Infection such as pneumonia and the fever that comes with it, dehydration and shifts in electrolytes as intake falls, medications and waste products accumulating as liver and kidney function declines, low oxygen, pain that is not well controlled, several days without a bowel movement or an inability to pass urine, newly started or newly adjusted medications, and simple sleep deprivation all place a load on the brain. Some of these — constipation, urinary retention, dehydration, a particular drug — can be identified and corrected, and the person may improve noticeably. In the final days, when several organ systems are failing together, the picture is often not reversible; this is sometimes called terminal delirium. Distinguishing between the two requires examination and clinical judgment.
Delirium does not have one appearance. Restlessness, repeated attempts to get up, and pulling at lines fit the hyperactive form. The hypoactive form looks like the opposite: withdrawn, slow to respond, sleeping through the day. Because it seems peaceful, hypoactive delirium is frequently missed. Mixed forms, alternating between the two, are also common.
There are practical things a family can do. Open the curtains by day and leave a soft light rather than total darkness at night, which helps with orientation. Keep a clock and calendar in view, and make sure glasses and hearing aids are being used. Speak in short, simple sentences and offer one idea at a time. If the person describes seeing something that is not there, arguing about the facts rarely helps; responding to the feeling — that it must have been frightening — is usually easier on both of you. Lowering the bed and clearing the surrounding area reduces the risk of falls. Physical restraints tend to increase agitation and the chance of injury, so they are considered only as a last resort and only in discussion with the care team.
Detail helps the clinical team. Note when the change began, which hours are worst, any medication recently added or adjusted, the last bowel movement and urine output, whether there has been fever, and whether facial expressions or sounds suggest pain. With that information the team can narrow the possible causes, treat what can be treated, and discuss adjusting medication if distress is severe. If comfort still cannot be achieved, a conversation about how much sedation is appropriate may follow. That is a decision made together with the team, not something a family should carry alone.
Families need care as well. Delirium does not translate directly into a number of days remaining, though it can signal that overall decline is progressing. It is entirely reasonable to ask the treating team how they see the course ahead. It also helps to remember that harsh words or a pushing hand during confusion come from an exhausted brain rather than from the person's true feelings. Share the nights among family members, ask the ward staff for support, and get some sleep yourself.
This article is general information and is not a substitute for medical care. Causes and management differ from person to person, so please discuss any decisions with the treating medical team.