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Delirium

Recognizing delirium

​In care settings, like hospitals or continuing care facilities, staff look for signs of delirium regularly. But family and friends often notice the signs first.

​If you notice that a family member or friend has any of the following changes in thinking or how they act, tell a nurse, doctor or other healthcare provider. If you are unsure, you can call Health Link at 811 to talk to a registered nurse.

With delirium the following signs may come and go:

  • sudden change in ability to do everyday tasks
  • trouble paying attention or concentrating 
  • trouble following conversations or understanding others
  • changes in behaviour (how the person acts)
  • rambling speech, going from topic to topic quickly, or speaking in garbled words 
  • forgetfulness
  • trouble recognizing familiar people
  • confusion about the time of day or place
  • sudden mood changes (being more confused, worried, or sad)
  • seeing or hearing things that are not there
  • more restless or quiet than usual
  • falling asleep during visits​​​

If you're at home and notice any of the above changes, and the person is suddenly very sick, confused, or hard to wake up, call 911 or get emergency medical help right away.

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Current as of: February 10, 2026

Author: Seniors Health and Continuing Care, Assisted Living Alberta