Parkinson’s Disease — NZ Condition Guide | KiwiMeds

What is Parkinson’s Disease?

Parkinson’s disease is a progressive neurological condition that primarily affects movement, caused by loss of dopamine-producing cells in the brain. It affects around 12,000 New Zealanders. While it is not curable, modern treatments can significantly manage symptoms and maintain quality of life for many years.

Overview

Parkinson’s disease symptoms include tremor (usually starting in one hand — a “pill-rolling” tremor at rest), rigidity (stiffness in the limbs and trunk), bradykinesia (slowness of movement), and postural instability (balance problems, increasing fall risk as disease progresses). Non-motor symptoms are also important: constipation, sleep problems, reduced sense of smell, depression, anxiety, cognitive changes, and autonomic problems. Symptoms are typically asymmetric (starting on one side).

Treatment in New Zealand

Levodopa (in combination with carbidopa — as Sinemet) remains the most effective medicine for Parkinson’s motor symptoms and is funded by Pharmac. Other funded medicines include dopamine agonists (ropinirole, pramipexole), MAO-B inhibitors (rasagiline, selegiline), and COMT inhibitors (entacapone). For advanced disease, deep brain stimulation (DBS) surgery and continuous intestinal gel infusions are available in NZ. Physiotherapy, occupational therapy, speech therapy, and exercise are crucial throughout the disease course.

NZ-Specific Information

Parkinson’s NZ (parkinsons.org.nz) provides excellent support, information, and a network of support groups throughout NZ. Specialist neurology or geriatric medicine care is recommended. The All Black of Parkinson’s — a well-known NZ program — promotes boxing exercise for Parkinson’s management.

Frequently Asked Questions

Is Parkinson’s disease fatal? Parkinson’s disease itself does not directly cause death, but complications (falls, pneumonia) can be life-threatening in advanced disease. Average life expectancy with Parkinson’s is approaching that of the general population with modern treatment. Is Parkinson’s disease hereditary? Most cases are sporadic (not inherited), but a small proportion (~10–15%) have a genetic component.

Supplements That May Support Management

⚠️ Important: The supplements listed below have varying levels of clinical evidence. They are not a substitute for prescribed medications and should only be considered as adjunctive support under the guidance of a qualified healthcare professional. Always inform your GP or pharmacist before commencing any supplement, as interactions with prescribed medicines are possible.

• Vitamin D — Vitamin D deficiency is significantly more prevalent in Parkinson’s disease and is associated with greater motor impairment and cognitive decline. Supplementation is recommended where deficiency is confirmed.
• Coenzyme Q10 — Mitochondrial dysfunction is central to Parkinson’s pathophysiology. CoQ10 at 1200 mg/day was studied in a large trial (QE3) but did not slow progression — though earlier smaller trials showed benefit. CoQ10 remains a commonly used supplement given its safety profile.
• N-Acetylcysteine (NAC) — A clinical trial demonstrated that NAC (IV plus oral combined protocol) improved dopaminergic neurotransmission in Parkinson’s disease as measured by DAT-SPECT scanning, with improvements in motor and non-motor symptom scores.
• Vitamin B12 and Folate — Levodopa and other Parkinson’s medications can elevate homocysteine levels, accelerating vascular and neurological complications. B12 and folate supplementation is recommended to maintain homocysteine within normal range.
• Omega-3 Fatty Acids (DHA) — DHA supports neuronal membrane integrity and reduces neuroinflammation relevant to dopaminergic neuron preservation. Supplementation may provide modest neuroprotective benefit.

Relevant Vaccinations

Individuals living with Parkinson’s disease may benefit from the following vaccinations. Please discuss your vaccination status with your GP or practice nurse, as eligibility and funding through the New Zealand National Immunisation Schedule may apply.

• Influenza (annual) — Influenza can precipitate Parkinson’s disease deterioration. Annual vaccination is funded and strongly recommended.
• Pneumococcal — Dysphagia (swallowing difficulties) in advanced Parkinson’s significantly increases aspiration pneumonia risk. Pneumococcal vaccination is strongly recommended.
• COVID-19 — COVID-19 can cause neurological deterioration in Parkinson’s disease. Maintaining vaccination is strongly recommended.
• Shingles (Shingrix) — Recommended for people aged 50+ with Parkinson’s disease, particularly those on immunomodulatory treatments.

Dietary Guidance

Evidence-based dietary modifications play a meaningful role in the management of Parkinson’s disease. The following foods are generally recommended as part of a balanced, condition-appropriate diet. A referral to a registered dietitian may be beneficial for personalised nutritional planning.

• Levodopa timing around meals (key interaction) — Dietary protein competes with levodopa absorption. People on levodopa therapy are often advised to take it 30–60 minutes before meals, and to avoid high-protein meals immediately before or after doses to maximise absorption and reduce motor fluctuations.
• Mediterranean dietary pattern — Mediterranean dietary adherence is associated with reduced Parkinson’s disease risk and slower progression in epidemiological studies.
• Probiotic and prebiotic-rich foods (fermented foods, high-fibre diet) — Constipation is among the most common and distressing non-motor symptoms of Parkinson’s. A high-fibre diet with adequate hydration and fermented foods supports bowel regularity. Emerging research on the gut-brain axis suggests the gut microbiome may play a role in Parkinson’s pathophysiology.
• Adequate hydration (2 litres daily) — Dehydration worsens constipation, orthostatic hypotension, and cognitive impairment — all common in Parkinson’s. Sufficient fluid intake is essential.
• Antioxidant-rich colourful produce — Oxidative stress is central to dopaminergic neuron degeneration. Foods rich in vitamin C, vitamin E, and polyphenols may provide complementary neuroprotective antioxidant support.

Related Conditions & Medications

Related medications: Levodopa. Related conditions: Depression, Dementia.