Sudden confusion or delirium: when urgent medical care matters
Sudden confusion is a medical emergency. If someone suddenly becomes confused, call 112 or go to the nearest emergency department now. Do not wait for a routine appointment.
Need help now?
Get help now if someone becomes confused over hours or days. Some causes can be life threatening. Signs include:
suddenly not thinking or speaking clearly, or not knowing where they are
suddenly being much sleepier, quieter or slower to respond than usual
seeing or hearing things that are not there
not being able to say their name, their age or today's date
Call 112 or go to the nearest emergency department. See crisis lines.
In short
Sudden confusion needs emergency medical care now, because some causes can be life threatening.
Delirium can look like agitation, or like unusual quietness and sleepiness.
Tell the medical team what the person is usually like and when the change began.
What should I do while we wait for help?
Stay with the person, and bring their medicines or a list of them if you can do so without delay. Many causes of sudden confusion need treatment quickly. Do not try to work out the cause yourself.
While you wait for help:
tell them who you are and where they are, and keep reassuring them
use simple words and short sentences
do not ask lots of questions
do not stop them moving around, unless they are in danger
do not give any sleeping tablet or calming medicine unless a doctor tells you to
What is delirium?
Delirium is a sudden change in thinking and attention, over hours or days. A person may not think or speak clearly. They may not know where they are.
They may struggle to pay attention or remember things. Some see or hear things that are not there.
The confusion often comes and goes during the day. A quick check is to ask their name, their age and today's date. If they seem unsure or cannot answer, call 112 or go to the nearest emergency department.
weave.clinicSudden confusion needs emergency medical care now. Tell the team what changed and when.
Can a quiet, sleepy change be delirium?
Yes. Delirium does not always look like agitation. Some people become withdrawn, slow to respond, sleepy and less interested in food. This quiet kind is often missed.
A person who already has dementia can also get delirium. So a sudden change in someone with dementia still needs emergency medical care now.
Slow forgetfulness over months is different. It needs a doctor's visit, but it is not usually an emergency.
What can cause sudden confusion?
Many things can, and doctors need to find the cause. Common causes include:
an infection, such as a urine infection
a stroke
low blood sugar in a person with diabetes
a head injury
some prescription medicines
alcohol, alcohol withdrawal, or drugs
breathing or heart problems
some kinds of seizures
Often more than one cause is involved. Treatment focuses on finding and treating the causes.
weave.clinicBring a current medicine list to the treating team. Do not delay urgent assessment while gathering records.
How can family help at the hospital?
Tell the team what the person is usually like and exactly when the change started. Mention any recent illness, falls, new medicines, alcohol or drugs.
A familiar face can help the person feel calmer and less lost. Gently remind them where they are and who you are. Make sure they have their glasses and hearing aids, if they use them.
weave.clinicExplain known wishes and useful observations to the treating team. Ask about the family's role while urgent assessment proceeds.
Does the person still get a say?
Yes. The person should still get explanations they can follow. Short, clear words help. You can ask the team what they are doing, why, and when it will be reviewed.
If you know what matters to the person, tell the team. Your view helps, but it does not replace the medical assessment.
weave.clinicExplanations still matter during a crisis. Ask what is being done and why.
What happens after the episode?
Delirium is common and often temporary, but follow-up with the person's own doctors matters. Before leaving hospital, ask:
what caused the delirium
which medicines were changed or stopped
what signs to watch for
who to contact if the confusion comes back
If the confusion does not clear, their doctors can look again for causes and may check memory later.
Some people remember the confusion and find it upsetting. Talking about it with their doctor can help.
weave.clinicAfter the episode, ask about causes, medicine changes and follow-up with the person's own doctors.
Questions to bring
What was the person like before, and when exactly did this change?
What possible causes are being checked?
Which medicines were changed, and why?
What should we watch for at home, and who do we call?