Parkinson's Disease and Seizures Are Separate Conditions
Parkinson's disease itself does not cause seizures. Seizures happen when there is a sudden burst of electrical activity in the brain that disrupts normal function. Parkinson's affects the brain's ability to produce dopamine, a chemical that controls movement — a different process entirely.
However, people with Parkinson's do have a higher risk of developing seizures than the general population. This increased risk comes from the disease's progression, the medications used to treat it, and other brain changes that can happen over time. Understanding this distinction matters because it changes how seizures are managed if they do occur.
Key Takeaways
- Parkinson's disease itself does not directly cause seizures, but people with Parkinson's have a higher risk of developing them than people without the disease.
- Seizure risk increases with advanced Parkinson's, particularly when cognitive decline or dementia develops.
- Some Parkinson's medications, especially at higher doses, can lower the seizure threshold and make seizures more likely.
- If you experience sudden loss of consciousness, muscle jerking, or confusion, report it to your doctor when ready rather than assuming it is related to Parkinson's alone.
Why Parkinson's Increases Seizure Risk
As Parkinson's progresses, the disease spreads beyond the motor areas of the brain to affect other regions. When it reaches areas involved in electrical signaling and impulse control, the risk of seizures rises. This is particularly true in the later stages of the disease.
People with Parkinson's who also develop Parkinson's disease dementia or Lewy body dementia have a notably higher seizure risk. These conditions involve more widespread brain changes and affect the brain's ability to regulate electrical activity. Studies show that seizures occur in a small but meaningful percentage of people with advanced Parkinson's, especially those with cognitive symptoms.
The longer someone has had Parkinson's and the more advanced the disease becomes, the more likely seizures become. This is not inevitable — many people with Parkinson's never develop seizures — but the risk is real and increases with disease duration.
How Parkinson's Medications Can Affect Seizure Risk
Several medications used to treat Parkinson's can lower the seizure threshold, meaning they make the brain more likely to have a seizure. Levodopa (also called L-dopa), the most common Parkinson's medication, can increase seizure risk at higher doses. Dopamine agonists like bromocriptine and pramipexole carry similar risks.
Stimulant medications and some antidepressants prescribed alongside Parkinson's treatment can also contribute. The risk is dose-dependent — higher doses carry greater risk — and it compounds when multiple medications are used together.
This does not mean you should stop taking your Parkinson's medications. Instead, it means your doctor needs to know about any seizure history in your family or any seizure-like episodes you experience. Your neurologist can adjust doses, monitor you more closely, or add seizure prevention medication if needed.
Signs of a Seizure to Watch For
Seizures can look different from person to person. Some people lose consciousness and have muscle jerking or stiffening. Others stay conscious but experience confusion, unusual sensations, or repetitive movements they cannot control. Some seizures are brief — lasting only seconds — while others last longer.
Common signs include sudden loss of awareness, falling, muscle rigidity or jerking, loss of bladder control, tongue biting, and confusion or drowsiness afterward. Staring spells or repetitive movements like lip smacking or hand movements can also be seizure activity.
Because Parkinson's itself causes movement problems and sometimes confusion, it can be tempting to assume a new symptom is just the disease progressing. This is a mistake. If you or a family member experience any sudden change in consciousness, unexplained falls, or unusual movements, tell your doctor right away. A seizure requires different treatment than Parkinson's alone.
What to Do If You Have a Seizure
If you have a seizure, your first step is to tell your neurologist and your primary care doctor. They will likely recommend an EEG (electroencephalogram), which records electrical activity in the brain and can show whether seizures are occurring. You may also have an MRI or other imaging to rule out other causes.
Once seizures are confirmed, your doctor may prescribe anti-seizure medication in addition to your Parkinson's treatment. Common choices include levetiracetam (Keppra), valproic acid, or lamotrigine. Your neurologist will choose based on your other medications, since some anti-seizure drugs interact with Parkinson's medications.
Keep a record of when seizures happen, what they look like, and how long they last. This information helps your doctor understand the pattern and adjust treatment. If you live alone, talk to your doctor about safety measures like bed rails or alert systems.
Seizures and Parkinson's Dementia
The connection between seizures and dementia in Parkinson's is important to understand. People with Parkinson's who develop cognitive decline or dementia have a much higher seizure risk than those without cognitive symptoms. In some cases, seizures are one of the first signs that dementia is developing.
If you notice memory problems, confusion, or difficulty with thinking alongside any new neurological symptoms, report this to your doctor. Early recognition of both dementia and seizure risk allows for earlier treatment and better management of both conditions.
Seizures themselves can also worsen cognitive function temporarily or permanently, so preventing them through medication is important for protecting brain health as much as for safety.
Living Safely With Parkinson's and Seizure Risk
If you have Parkinson's and are concerned about seizure risk, there are practical steps you can take. Work with your neurologist to keep your Parkinson's medications at the lowest effective dose. Avoid triggers like sleep deprivation, stress, or missed doses of medication, all of which can lower seizure threshold.
Tell family members and caregivers what a seizure looks like so they can recognize one and respond appropriately. Keep a list of your medications and any seizure history to share with emergency responders. If you drive, discuss with your doctor whether it is safe to continue — seizure disorders often have legal restrictions on driving.
Regular follow-up with your neurologist matters more if you are at higher risk. Do not wait for a seizure to happen to discuss this risk. Bring it up at your next appointment, especially if you have had Parkinson's for many years or if you are noticing cognitive changes.
Frequently Asked Questions
Can Parkinson's medication cause seizures even if I have never had one before?
Yes. Some people develop seizures for the first time after starting or increasing Parkinson's medication, particularly at higher doses. This is why your doctor monitors you and adjusts doses carefully. If you notice new symptoms like staring spells, confusion, or unusual movements after a medication change, report them when ready.
If I have a seizure, does that mean my Parkinson's is getting worse?
A seizure usually signals that your brain is changing in ways that require new treatment, but it is not necessarily a sign that Parkinson's itself is progressing faster. Seizures are a separate condition that needs its own management. Your neurologist can explain what the seizure means for your specific situation.
Are seizures common in people with Parkinson's?
Seizures are not common in early or mid-stage Parkinson's, but they become more likely in advanced disease, especially when dementia is present. Most people with Parkinson's never develop seizures, but the risk is real enough that it is worth discussing with your doctor, particularly if you have had the disease for many years.
What should I do if someone with Parkinson's has a seizure?
Stay calm, keep them safe from injury, and do not restrain them. Turn them on their side if possible to keep their airway clear. Time the seizure if you can. Call 911 if the seizure lasts longer than five minutes, if they have multiple seizures, or if they do not regain consciousness. After the seizure, let them rest and contact their doctor.
Can anti-seizure medication interfere with my Parkinson's treatment?
Some anti-seizure medications can interact with Parkinson's drugs, but neurologists are experienced at managing both conditions together. Your doctor will choose an anti-seizure medication that works safely with what you are already taking. Always tell any new doctor about both your Parkinson's and seizure medications.