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What is the treatment for delirium?

Page last reviewed: July 2026

There is no tablet that cures delirium. Treatment means finding and treating the causes, and supporting the person until the brain recovers.

Families often expect there to be a drug for it. There is not. Delirium is a sign that something else is wrong in the body, and the work is finding out what.

Treating the causes

The team should be looking for:

  • infection
  • new or changed medicines
  • dehydration
  • difficulty passing stools or urinary retention, which means being unable to empty the bladder
  • pain that is not controlled
  • low oxygen levels
  • problems shown by blood tests

Medicines are a common cause. The treating doctor or nurse should review them and decide whether any need to be stopped or changed.

There is usually more than one cause, so the search should not stop at the first thing found. There is more about this in can a urine infection cause confusion?

Care that helps recovery

Glasses on and hearing aids in. Curtains open by day and lights down at night. Help with food and drink. Getting up and moving about. Familiar people at the bedside, and a clock and a calendar in view. These ordinary measures are part of care and may shorten delirium. If you cannot see them happening, ask.

Sedative medicines

Medicines that make a person drowsy are sometimes used in small doses, for short periods, when someone is so distressed or frightened that they are at risk. They treat the distress. They do not treat the delirium itself and they do not shorten it, and they carry their own risks in older people.

If sedation is suggested, it is reasonable to ask what has been tried first and how long it is meant to go on for.

When to get help

New sudden confusion is a medical emergency. Outside a care setting, phone the local emergency number now. In a hospital or care home, tell staff immediately. Say what has changed and ask whether it could be delirium.

This page is general information, not advice about an individual. Written by Professor Alasdair MacLullich, Professor of Geriatric Medicine, University of Edinburgh. Reviewed July 2026.