Seeing people who are not there can be a visual hallucination related to Parkinson's disease psychosis. Tell your parent's clinician, especially if the visions are new, suddenly worse, frightening, or accompanied by confusion. These experiences may come from Parkinson's itself, medication effects, dementia, or a short-term medical problem called delirium. A clinician needs to identify the likely cause before changing treatment.
Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.
Table of Contents
- What might your parent be experiencing?
- When does this need urgent assessment?
- Why can hallucinations happen?
- How should you respond during an episode?
- What treatment might the clinician consider?
What might your parent be experiencing?
A hallucination is a sensory experience without an external source. Your parent may clearly see a person or animal that is not present while fully awake. Visual hallucinations are the usual type in Parkinson's; unreal voices or sounds are less common, while hallucinations involving smell, touch, or taste are rare. An illusion is different.
It happens when the brain misinterprets something real, such as seeing hanging clothes as a person. Dim light can make these mistakes more likely. The Parkinson's Foundation estimates that 20–40% of people with Parkinson's report hallucinations or delusions. However, that range includes temporary delirium and minor illusions, so it does not mean persistent symptoms affect most patients. The Parkinson's Foundation explains these distinctions and estimates.
When does this need urgent assessment?
Contact a clinician promptly when hallucinations begin or change abruptly. Delirium can develop over hours or days because of a treatable problem, including infection, dehydration, electrolyte abnormalities, or medication effects.
Seek urgent medical help when the change is sudden or your parent seems acutely ill, severely confused, unsafe, or unable to follow basic directions. Do not assume a rapid change is simply Parkinson's progressing. Before contacting the medical team, note:.
- When the visions started and whether they are becoming more frequent
- What your parent sees and how long each episode lasts
- Whether they recognize that the image is unreal
- Recent medication additions, removals, or dose changes
- Signs of illness, reduced drinking, sleep disruption, or increased confusion
Why can hallucinations happen?
parkinson's medications can contribute, but they are not the only possible cause. Dementia and delirium are also major contributors. Risk is higher with impaired memory, older age, sleep disorders, poor vision, and advanced Parkinson's disease. That mix of possible causes makes a medical review important even when the person is calm and knows the vision is not real. The clinician may review physical health, cognition, vision, sleep, and every prescription and nonprescription medicine.
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NICE recommends that clinicians ask both patients and care partners about hallucinations or delusions and perform a general medical evaluation for triggers. It also says a specialist may consider reducing contributing Parkinson's medicines, while accounting for the possible effect on movement symptoms. See the NICE recommendations. Do not stop or reduce Parkinson's medication without specialist guidance. A change intended to reduce hallucinations could also worsen stiffness, slowness, tremor, or mobility.
How should you respond during an episode?
Stay calm and offer reassurance. Arguing about whether the person is real may increase fear without changing what your parent sees.
You can acknowledge the distress without confirming the hallucination: "I understand that you see someone. You're safe, and I'm here." Try practical changes: Better lighting may reduce visually triggered episodes, but it does not replace medical assessment. The Parkinson's Foundation advises telling clinicians even when hallucinations seem mild or do not upset the person.
- Turn on lights and reduce shadows
- Check whether clothing, furniture, or reflections are being misread
- Guide your parent to a familiar, well-lit room
- Remove immediate fall or wandering hazards
- Record the episode for the clinician
What treatment might the clinician consider?
Treatment depends on the cause and how much danger or distress the symptoms create. The first steps may include treating delirium, addressing another trigger, or having a Parkinson's specialist carefully adjust contributing medicines. Pimavanserin is identified in FDA labeling as a treatment for hallucinations and delusions associated with Parkinson's disease psychosis.
It has precautions concerning QT prolongation, an abnormality in the heart's electrical cycle, and the label carries a boxed warning about increased mortality with antipsychotic drugs in elderly patients with dementia-related psychosis. The January 2025 FDA prescribing information details these warnings. Medication decisions require an individual risk assessment. Give the clinician a complete medication list and mention heart conditions, fainting, and any drugs or supplements your parent takes.
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