Hello everyone,
I’m looking for advice and experiences from people who have Parkinson’s disease themselves or care for a parent or family member with Parkinson’s and similar symptoms.
My father is 74 years old and has been living with Parkinson’s disease for approximately 3 years. He also has a long-standing history of epilepsy, which has been treated with medication for around 15 years.
Recently, one of our biggest concerns has been a persistent and distressing belief that something is inside his eyes.
1. The main symptom
My father repeatedly says that there are kilos of soil or dirt inside his eyes. He seems convinced that this is real and sometimes tries to check his eyes in the mirror or remove what he believes is there.
He does not seem to recognise that this belief may not correspond to what is physically happening. It is very difficult for the family to reassure him.
We are concerned about whether this could be a somatic delusion, Parkinson’s disease psychosis, a medication-related psychiatric symptom, or something else.
I would particularly like to hear from anyone whose parent with Parkinson’s has developed a similar fixed belief involving their eyes or another part of their body.
- Has anyone experienced a delusion involving dirt, a foreign object, or something physically present inside the body?
- Was it related to Parkinson’s disease, medication, cognitive changes, or another medical condition?
- What helped the person recover or manage the symptom?
- Did the belief eventually disappear, or did it require long-term treatment?
2. Current medical history
My father’s relevant medical history includes:
- Age: 74 years
- Parkinson’s disease: approximately 3 years
- Epilepsy: approximately 15 years
- Hypertension
- Hypothyroidism
- Type 2 diabetes
- Difficulty walking associated with his overall health and Parkinson’s disease
His seizures have not recently increased, as far as we know. Our main concern at present is the persistent belief about his eyes.
3. Current medications
The medications we have on our list include:
- Syndopa Plus 125: one tablet in the morning, afternoon, and at night
- Levigress 500 mg (levetiracetam): morning and night for epilepsy
- QUtan 25 mg (quetiapine): at night, prescribed for the current symptoms
- Thyronorm 100 mcg: for hypothyroidism
- Asar 40 mg: for blood pressure
- Ecosprin 75 mg: aspirin
- Sitamerz M 50/500: for diabetes
- Rosuless-F 10: for cholesterol/triglycerides
- Urotone DS 50 mg
- Bio-D3 Max: vitamin/calcium-related supplement
Please note that I am listing these from his medication records, and the exact ingredients of some branded products should be verified from their packaging.
I would appreciate hearing from anyone whose family member developed hallucinations, delusions, or behavioural changes while taking levodopa/carbidopa or levetiracetam.
Questions:
- Could either Parkinson’s medication or epilepsy medication contribute to these symptoms?
- Have you seen improvement after a neurologist reviewed the medication regimen?
- Has low-dose quetiapine (25 mg at night) helped in similar cases? If so, how long did it take to notice a difference?
- If quetiapine does not help sufficiently, what options did your specialist discuss?
We will not change or stop his medication without his treating doctor’s guidance.
4. Could vitamin B6 or B12 deficiency be contributing?
I am also investigating whether nutritional deficiencies could be contributing to his neurological or behavioural symptoms.
His blood tests from May 2026 showed the following:
- Vitamin B12: 203 pg/mL, slightly below the laboratory reference range.
- Homocysteine: 34.69 µmol/L, elevated.
- Folate (B9): above 24 ng/mL, within the laboratory’s stated normal range.
- Vitamin D: 24.3 ng/mL, below the laboratory’s stated target range.
- Haemoglobin: approximately 11.3 g/dL, indicating anaemia.
- Transferrin saturation: 8.64%, low.
Vitamin B6 was not measured in that report.
I came across a case report discussing severe seizures associated with vitamin B6 deficiency in a person receiving levodopa/carbidopa. This made me wonder whether B6 status could be worth investigating in my father’s case. I understand that a single case report does not establish that B6 deficiency causes psychosis or delusions in people with Parkinson’s.
Questions about vitamins and testing:
- Has anyone with Parkinson’s and delusions been found to have low vitamin B6 (plasma pyridoxal-5-phosphate/PLP)?
- Did correcting a confirmed B6, B12, or other nutritional deficiency improve the symptoms?
- Is there evidence of a connection between levodopa/carbidopa and clinically significant B6 deficiency in patients like this?
- Given his elevated homocysteine and low B12, what investigations would be reasonable to discuss with his neurologist?
- Could his anaemia or other medical problems be contributing to confusion or behavioural changes?
I do not want to assume that vitamins are the answer or give him high-dose supplements without appropriate testing and medical advice.
5. What other causes should we investigate?
We want to make sure we do not attribute everything to Parkinson’s without checking for other treatable causes.
For people who have faced something similar, did the doctors investigate:
- Urinary or other infections and delirium
- Eye conditions or visual impairment
- Medication side effects or interactions
- Cognitive impairment associated with Parkinson’s
- Sleep disturbances
- Vitamin deficiencies or metabolic abnormalities
If a person develops this kind of fixed belief, what assessments were most useful in identifying the cause?
6. What has helped in similar cases?
I would especially appreciate practical experiences from families who have already gone through this.
- Which specialist helped most: a movement-disorder neurologist, a neuropsychiatrist, a geriatric psychiatrist, or someone else?
- Which treatment or medication review made the greatest difference?
- How did you respond when your family member insisted that the belief was real?
- Did you find any communication or distraction techniques that reduced distress?
- How did you prevent the person from repeatedly checking, rubbing, or trying to remove something from their eyes?
We are trying to find a way to reduce his distress while keeping him safe and preserving his mobility and quality of life.
I would be grateful for any experiences, suggestions about questions to ask his neurologist, or recommendations for reliable resources.
I am not looking to replace professional medical advice. I am hoping to learn from people who have encountered a similar situation and understand which avenues were worth exploring.
Thank you for reading and for sharing your experiences.