What raises a person’s risk?

Delirium can happen while a person is being treated for an illness or other serious health condition. It can also happen after surgery. The person may be in a hospital or nursing home. Or they may be at home. Delirium often goes unrecognized in older adults.

A person is at risk for delirium if they have 1 or more of these:

• Current dementia or cognitive impairment

• A past episode of delirium

• Depression

• Are age 75 or older

• Any serious illness, such as cancer, heart attack, or metabolism problem such as those linked to kidney or liver failure

• Been admitted to intensive care in a hospital

• Physical restraints

• Been using or are withdrawing from drugs or alcohol

• Past or current brain injury or disease

• A bladder catheter

• An infection

• Broken bones, especially those that need orthopedic surgery

• Sleep problems because of light, noise, or other disruptions

• Constant or severe pain that isn't well-managed

• Fluid loss (dehydration)

• Poor nutrition

• Poor eyesight or hearing

• Several tests or treatments in a short time

• Not able to move or have pain with movement

• Recent surgery with anesthesia

Medicines that raise the risk of delirium

Certain medicines can raise a person’s risk of having delirium. They include:

• Prescription medicines. This includes sedatives, narcotics, antispasmodics, antibiotics, muscle relaxants, steroids, high blood pressure medicine, antacids, antidepressants, heart medicines, nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen, and pain medicines, especially opiates.

• Over-the-counter medicines. This includes allergy medicine, cough medicine, sleeping pills, and antinausea medicine. Diphenhydramine, found in many allergy and sleeping pills, is a very common cause.

• Some herbal medicines

• Psychoactive medicines

If you know someone at risk

Delirium is an emergency. If you think that your loved one has delirium, call 911 right away.