Delirium may improve over days, but it can last weeks or months. Recovery varies with the illness and the person. Some people have lasting changes in thinking or everyday abilities. Continuing confusion needs a care and review plan.
Can delirium last for weeks or months?
Delirium that carries on for a long time is called persistent delirium. It still needs treatment and support.
Can delirium come and go?
Delirium often fluctuates: someone may follow a conversation at one time and struggle later. A clearer spell does not prove recovery. Tell the team about the changes and how they compare with the person’s usual state. A sudden deterioration needs medical assessment now, even during recovery. See why delirium can be worse in the evening.
The body often recovers before the mind
Someone can be walking and eating normally while still confused, or clear in their thinking but worn out by a shower. Tiredness and poor concentration are common for some weeks after the confusion itself has cleared. There is more about what to expect after delirium.
When should continuing delirium be reviewed?
Ask the treating team what review is planned and whom to contact if you are worried. You do not need to wait weeks if the person is not improving or you are struggling to care for them. The doctors should review the possible causes, medicines and support needs, and consider whether another illness could explain the symptoms. You can ask whether advice from another specialist would help. A sudden deterioration needs medical assessment now. Read more about review when delirium is not improving.
When to get help
Delirium (acute confusion) is a medical emergency. Outside a care setting, call local emergency services now. In a hospital, care home or nursing home, tell staff immediately. Say what has changed and ask whether it could be delirium.