Parkinson's disease does not directly cause seizures, but people with Parkinson's have a higher risk of seizures than the general population

Seizures are not a primary symptom of Parkinson's disease itself. However, research shows that people with Parkinson's are roughly two to three times more likely to experience seizures than people without the condition. The increased risk comes from several sources: the underlying brain changes that cause Parkinson's, certain medications used to treat it, and other health conditions that often occur alongside Parkinson's.

Understanding this distinction matters because it changes how you and your doctor approach the problem. If you or a family member with Parkinson's has a seizure, it is not automatically a sign that the disease has progressed in a particular way — it signals that something else needs investigation and possibly a change in treatment.

Key Takeaways

  • Seizures are not a typical symptom of Parkinson's disease, but people with Parkinson's have a higher risk than the general population.
  • Levodopa and other Parkinson's medications can lower the seizure threshold, especially at higher doses or when combined with other drugs.
  • Sleep deprivation, infection, low blood sugar, and other treatable conditions often trigger seizures in people with Parkinson's and should be checked first.
  • If a seizure occurs, tell your neurologist when ready so they can review your medications and rule out other causes.
  • Seizure risk increases as Parkinson's progresses and cognitive decline develops, particularly in advanced stages.

How Parkinson's medications can increase seizure risk

The medications that treat Parkinson's motor symptoms — particularly levodopa (also called L-DOPA) — can lower the threshold for seizures. This does not mean the medication causes seizures in everyone who takes it, but it does mean the brain becomes more prone to abnormal electrical activity. The risk rises with higher doses and with longer duration of treatment.

Other Parkinson's drugs also carry this risk. Dopamine agonists like bromocriptine and pramipexole, MAO inhibitors like selegiline, and amantadine can all contribute to seizure risk, especially when combined with levodopa. If you have had a seizure and take multiple Parkinson's medications, your neurologist may adjust doses, change the timing of doses, or switch to a different medication class to reduce the risk while still managing your motor symptoms.

Treatable conditions that trigger seizures in people with Parkinson's

Before assuming a seizure is related to Parkinson's or its medications, your doctor will check for reversible causes. Sleep deprivation is one of the most common triggers — people with Parkinson's often have fragmented sleep, and exhaustion lowers seizure threshold significantly. Infection, particularly urinary tract infections and pneumonia, can provoke seizures even when fever is mild. Low blood sugar, dehydration, and electrolyte imbalances are also frequent culprits and are easily corrected.

Medication interactions matter too. If you take other drugs alongside Parkinson's medications — for depression, anxiety, high blood pressure, or other conditions — some combinations increase seizure risk. Your neurologist and primary care doctor should review your full medication list after a seizure. Stopping or reducing alcohol use, improving sleep habits, and treating infections promptly can prevent future seizures without changing your Parkinson's treatment.

Seizure risk in advanced Parkinson's disease

Seizure risk rises as Parkinson's progresses, particularly when cognitive decline develops. People in advanced stages of Parkinson's — those with dementia or severe motor impairment — have a notably higher seizure rate than those in early stages. This reflects both the spread of brain pathology and the cumulative effect of long-term medication use.

In advanced disease, seizures may be harder to recognize because they can be subtle: a brief staring spell, a few seconds of jerking in one limb, or a sudden change in awareness rather than the dramatic convulsions people often picture. Caregivers and family members should report any unusual episodes to the neurologist, even if they seem minor. Early recognition and treatment prevent serious injury and help preserve quality of life.

What to do if a seizure occurs

If someone with Parkinson's has a seizure, the when ready steps are the same as for anyone: keep them safe from injury, turn them on their side if possible to keep the airway clear, and do not put anything in their mouth. Call 911 if the seizure lasts longer than five minutes, if multiple seizures occur in a row, or if the person does not regain full consciousness afterward.

After the seizure has stopped and emergency care is provided if needed, contact your neurologist the same day or the next morning. Bring a written description of what happened: how long it lasted, which body parts moved, whether the person was conscious, and what they were doing just before it started. This information helps your doctor determine whether the seizure was related to Parkinson's medications, an underlying seizure disorder, or something else entirely. Your doctor may order an EEG (electroencephalogram) or brain imaging to investigate further.

When a seizure disorder diagnosis is made

If a person with Parkinson's has more than one seizure, or if an EEG shows abnormal electrical activity, a seizure disorder diagnosis may be made. This does not mean Parkinson's has "turned into" a seizure disorder — it means the person now has two separate neurological conditions that need to be managed together.

Treatment usually involves an anti-seizure medication (also called an anticonvulsant), such as levetiracetam, valproic acid, or lamotrigine. Your neurologist will choose one that does not worsen Parkinson's symptoms and does not interact badly with your current Parkinson's drugs. Some anti-seizure medications can actually improve mood and sleep, which may help overall quality of life. The goal is to prevent seizures while keeping Parkinson's motor and cognitive symptoms as stable as possible.

Talking with your doctor about seizure concerns

If you have Parkinson's and are worried about seizure risk, or if you have noticed any unusual episodes that might be seizures, bring this up at your next neurology appointment. Write down what you observed: any staring spells, jerking movements, periods of confusion, or loss of consciousness, even if they lasted only seconds. Note when they happened, what you were doing, and how you felt afterward.

Ask your doctor directly whether your current medications carry seizure risk and what warning signs to watch for. If you have other health conditions — sleep apnea, diabetes, depression — mention them, because they can interact with Parkinson's to raise seizure risk. Your neurologist may recommend sleep studies, medication adjustments, or other preventive steps. Being proactive about this conversation helps catch problems early and keeps your treatment plan aligned with your actual health needs.

Frequently Asked Questions

Is a seizure a sign that my Parkinson's is getting worse?

Not necessarily. A seizure means something has changed — either your medication dose, your sleep, an infection, or another factor — but it does not automatically mean Parkinson's itself has progressed. Your doctor will investigate the cause. Many seizures in people with Parkinson's are triggered by reversible problems like sleep deprivation or infection, not by worsening of the underlying disease.

Can I still take levodopa if I have had a seizure?

Usually yes, but your dose or timing may change. Levodopa is essential for managing Parkinson's motor symptoms, and stopping it abruptly can cause serious problems. Your neurologist will work to find a dose that controls your Parkinson's symptoms while minimizing seizure risk, possibly by adding an anti-seizure medication or adjusting when you take your doses.

What is the difference between a seizure and a Parkinson's tremor or freezing episode?

Tremor and freezing are Parkinson's symptoms. A seizure involves abnormal electrical activity in the brain and usually causes loss of awareness, jerking movements you cannot control, or staring spells. If you are unsure whether an episode was a seizure, describe it to your neurologist in detail — they can often tell the difference based on your description and may order an EEG to confirm.

Do all people with Parkinson's eventually have seizures?

No. While seizure risk is higher in Parkinson's than in the general population, most people with Parkinson's never have a seizure. Risk increases with disease duration and cognitive decline, but it remains uncommon in early and middle stages of the disease.