Dementia of the Alzheimer’s Type with Delusions
People with Alzheimer’s disease may experience delusions—false beliefs that feel completely real to them—along with suspicion and paranoia. These symptoms can be frightening and distressing for both the person living with the disease and their caregivers, often creating difficult challenges in daily life.
Table of contents
- What Are Delusions and Paranoia in Alzheimer’s Disease?
- How Common Are Delusions in Alzheimer’s?
- Why Delusions Happen
- Types of Delusions and Related Symptoms
- Impact on Daily Life
- Coping Strategies for Caregivers
- When to Seek Medical Help
- Treatment Approaches
What Are Delusions and Paranoia in Alzheimer’s Disease?
Delusions are false beliefs that the person thinks are real, even when evidence shows they are not true[1]. For someone with Alzheimer’s disease, these beliefs feel completely genuine and cannot be shaken through reasoning or evidence[2].
Paranoia is a specific type of delusion where a person believes—without good reason—that others are mean, lying, unfair, or trying to harm them[3]. Someone experiencing paranoia may become suspicious, fearful, or jealous of people around them, including family members and caregivers.
These symptoms differ from hallucinations, which involve seeing, hearing, smelling, tasting, or feeling things that are not actually there[3]. While hallucinations involve false sensory experiences, delusions are firmly held false beliefs about reality[4].
How Common Are Delusions in Alzheimer’s?
Delusions are a common symptom in people with Alzheimer’s disease. Research shows that delusions occur in approximately 30 to 40 percent of people with Alzheimer’s at some point during their illness[15]. Some studies suggest that delusions may be present in 15 to 75 percent of patients with Alzheimer’s disease[13].
Paranoia is the most common type of delusion among patients with dementia[7]. These symptoms tend to occur more often in the later stages of the disease, particularly when the person becomes more dependent on others for care[3].
Why Delusions Happen
Delusions in Alzheimer’s disease result from complex changes happening in the brain. Dementia causes the brain to misinterpret the information it receives, leading to false beliefs[4]. The progressive deterioration of brain cells is the chief cause of these behavioral symptoms[11].
Memory loss plays an important role in paranoia. In a person with Alzheimer’s, paranoia is often linked to forgetting things[3]. For example, if a person forgets where they put something, they may believe someone is taking their things. If they forget you are their caregiver, they may see you as a stranger and not trust you. If they forget directions you just provided, they may believe you are trying to trick them[3].
Paranoia may be the person’s way of expressing loss. The person may blame or accuse others because no other explanation seems to make sense to them[3].
Several other factors can contribute to or worsen delusions, including poor eyesight or hearing, physical illness such as infection or fever, mental health conditions, side effects from medications, new or changed environments, and being overwhelmed by too many things happening at once[4].
Types of Delusions and Related Symptoms
Common types of delusions in Alzheimer’s disease include believing that family members are impostors, thinking that strangers are living in their home, or failing to recognize their own reflection in a mirror[13]. People may also believe someone is stealing their possessions or that they are being given poison instead of medication[4].
A person with Alzheimer’s may become suspicious of those around them, even accusing others of theft, infidelity, or other improper behavior[1]. They may suspect that their family members are impostors or believe that strangers are living in their home[13].
Strong emotional memories from the person’s past may re-emerge as delusions. The person may have trouble separating past experiences from current reality and may re-live these events to a certain extent[7].
Impact on Daily Life
Delusions and paranoia can significantly affect both the person with Alzheimer’s and their caregivers. These symptoms can lead to fear and frustration for everyone involved[3]. While accusations can be hurtful, it is important to remember that the disease is causing these behaviors[1].
Serious consequences have been associated with delusions in patients with Alzheimer’s disease, including increased likelihood of nursing home placement, faster progression of dementia, and increased risk of illness and death[16]. Many families find that delusions and other behavioral symptoms become severe enough that they can no longer care for their loved one at home[26].
For the person experiencing delusions, these false beliefs feel completely real and can be frightening[4]. A person experiencing a delusion may feel suspicious, jealous, or fearful[7].
Coping Strategies for Caregivers
When someone with Alzheimer’s experiences delusions or paranoia, caregivers can use several strategies to help manage these challenging situations.
Stay calm and be patient. Remind yourself that dementia is a brain disease causing these symptoms, and what you see is not intentional behavior[7].
Do not argue about what the person believes. Arguing does not work with delusions[4]. Instead of trying to convince them they are wrong, acknowledge their feelings and offer comfort if they are afraid[3].
Try not to take offense. While accusations can be hurtful, remember that the disease is causing these behaviors[1].
Use distraction. Sometimes moving to another room or going outside for a walk helps[3]. You can also try focusing on a photo or keepsake to redirect attention[7].
Respond to the feelings behind the words. For example, if they are frightened or worried, acknowledge those emotions with empathy[4].
Offer comfort in a respectful way if the person is feeling afraid. Use gentle touching, such as holding a hand, hugging, or rubbing their back. Let them know they are safe[7].
Make sure the environment is calm. Turn off the television when violent or upsetting programs are on, as someone with Alzheimer’s may think these events are happening in the room[3]. Observe the environment for any noises, shadows, or objects that could be triggering fear[7].
Help others understand the changing behaviors. Make sure family members and caregivers understand that suspicions and false beliefs are symptoms of the disease[1].
When to Seek Medical Help
Tell the person’s doctor about the delusions or paranoia. Discuss any illnesses the person has and medicines they are taking, as sometimes an illness or medicine may cause or worsen these symptoms[3].
It is important to maintain accurate documentation and communicate with the healthcare team about behavioral issues so that an accurate diagnosis can be established[7]. Experienced psychologists and social workers on the dementia care team can help evaluate and interpret troubling behaviors[7].
Make sure the person is safe and cannot reach anything they could use to hurt themselves or anyone else[3]. If delusions lead to persistent aggression or extreme distress, medical intervention may be necessary.
Treatment Approaches
Management of delusions requires a comprehensive approach that includes both non-drug and medication strategies[13].
Non-drug approaches are important and should generally come first[7]. These interventions may be used for virtually all behavior disorders in patients with dementia[13]. They include counseling the caregiver about the non-intentional nature of the symptoms, offering coping strategies, behavior modification, appropriate use of sensory intervention, environmental safety, and maintaining consistent routines such as providing meals, exercise, and sleep on a regular basis[13].
Medication may be considered when delusions cause significant distress or danger. Current research shows that delusions in Alzheimer’s disease can respond to medication treatment[14].
Atypical antipsychotics have shown effectiveness and are generally best tolerated. These medications should be used at the lowest dose and for the shortest time possible, with regular reviews[17]. However, there is an increased risk of death in older adults with dementia-related symptoms who take these medications[15].
Sometimes short-term medications are valuable for reducing a patient’s distress, but non-drug interventions generally should come first[7]. Some medicines can also cause negative side effects and actually make things worse[7].
The goal of treatment should include symptom reduction and preservation of quality of life[13].
