Can Parkinson’s Cause Seizures?

Can Parkinson’s cause seizures? The honest answer is: not usually in a simple, direct way. Parkinson’s disease is best known as a movement disorder that causes tremor, stiffness, slowed movement, and balance trouble. Seizures, on the other hand, happen when there is a sudden burst of abnormal electrical activity in the brain. They are different conditions, even if both are, rather inconveniently, brain-related.

That said, real life is rarely tidy enough to fit into one neat medical drawer. Some people with Parkinson’s disease may experience seizures, and research suggests there may be a higher risk of epilepsy or seizure-like events among people living with Parkinson’s compared with people who do not have Parkinson’s. The key point is that an association is not the same as proof that Parkinson’s directly “causes” seizures.

In other words, Parkinson’s and seizures can show up at the same party, but Parkinson’s is not always the host. Age, dementia, stroke, medication effects, vitamin deficiencies, sleep problems, infections, and other neurological conditions may all play a role. Let’s unpack the connection without turning your brain into a medical textbook wearing a lab coat.

Quick Answer: Parkinson’s Is Not a Common Direct Cause of Seizures

Parkinson’s disease does not typically cause seizures as one of its main symptoms. The hallmark symptoms of Parkinson’s include resting tremor, muscle rigidity, bradykinesia, which means slowed movement, shuffling gait, smaller handwriting, softer speech, and problems with posture or balance.

Seizures are different. A seizure may cause staring spells, sudden confusion, jerking movements, temporary loss of awareness, unusual sensations, lip-smacking, repetitive movements, or full-body convulsions. Some seizures are dramatic; others are so subtle they look like someone simply “zoned out” for a moment.

So, can a person have both Parkinson’s and seizures? Yes. Does every person with Parkinson’s need to worry about seizures? No. Most people with Parkinson’s will never have a seizure because of Parkinson’s itself. But if a new seizure-like episode happens, it deserves medical attention, especially in an older adult or someone with changing cognition.

What Parkinson’s Disease Does to the Brain

Parkinson’s disease is a progressive nervous system disorder. It develops when certain brain cells, especially cells involved in producing dopamine, gradually stop working properly or die. Dopamine helps the brain coordinate movement. When dopamine levels fall, movement becomes less smooth, which is why tremor, stiffness, slow movement, and balance problems appear.

But Parkinson’s is not only about movement. Many people also experience non-motor symptoms, such as constipation, sleep problems, depression, anxiety, fatigue, pain, low blood pressure, urinary issues, hallucinations, and cognitive changes. These symptoms can sometimes be more frustrating than the tremor itself. After all, a shaky hand is annoying, but poor sleep plus brain fog can make the day feel like wading through peanut butter.

As Parkinson’s progresses, some people develop Parkinson’s disease dementia or more significant thinking and memory problems. This matters because dementia and other brain conditions can increase seizure risk in older adults. So while Parkinson’s may not directly flip a “seizure switch,” later-stage neurological changes and overlapping conditions may make the picture more complicated.

Why Seizures May Happen in Someone With Parkinson’s

When a person with Parkinson’s has a seizure, doctors usually look for the broader reason. The cause may be related to Parkinson’s, indirectly related, or completely separate. Here are the most important possibilities.

1. Age and Shared Risk Factors

Parkinson’s disease is more common in older adults, and seizures also become more common with age. Older adults are more likely to have stroke, small-vessel brain disease, head injuries from falls, metabolic problems, infections, medication interactions, and dementia. Any of these can raise the risk of seizures.

This means a person with Parkinson’s who has a seizure may not be having a seizure “because of Parkinson’s.” They may be having a seizure because they also had a silent stroke, a recent fall, low sodium, low blood sugar, an infection, or another condition affecting the brain. The detective work matters.

2. Parkinson’s Disease Dementia and Brain Changes

Some people with Parkinson’s develop permanent cognitive changes that interfere with daily life. Dementia itself is linked with a higher chance of seizures, especially in older adults. The brain becomes more vulnerable when memory networks, attention systems, and communication between nerve cells are disrupted.

For example, a person with advanced Parkinson’s may begin having brief episodes of confusion, staring, or unresponsiveness. These episodes could be seizures, but they could also be delirium, medication side effects, sleep attacks, blood pressure drops, or hallucinations. A neurologist may use history, medication review, blood tests, brain imaging, and an EEG to help sort it out.

3. Medication Effects and Vitamin B6 Deficiency

One of the most important recent updates involves carbidopa/levodopa, a common Parkinson’s medication combination. In 2026, the U.S. Food and Drug Administration required warning language for carbidopa/levodopa products because these medications can contribute to vitamin B6 deficiency and, in rare cases, vitamin B6 deficiency-associated seizures.

This does not mean people should panic or stop their Parkinson’s medication. Please do not throw your pills into the nearest trash can like you are starring in a dramatic medical thriller. Carbidopa/levodopa remains a cornerstone treatment for Parkinson’s symptoms. But it does mean patients and caregivers should know the warning and discuss it with the prescribing clinician.

Symptoms of vitamin B6 deficiency may include seizures, confusion, depression, inflammation of the lips or tongue, skin irritation, anemia, numbness, tingling, sharp nerve pain, or muscle weakness. Higher doses of carbidopa/levodopa may increase the risk. Clinicians may check vitamin B6 levels before and during treatment and recommend supplementation when appropriate.

4. Seizure-Like Episodes That Are Not Epileptic Seizures

Parkinson’s can cause symptoms that may be mistaken for seizures. For instance, freezing episodes can make someone suddenly stop moving. Tremor can look rhythmic and alarming. Fainting from low blood pressure can cause collapse and brief shaking. REM sleep behavior disorder can cause a person to act out dreams. Hallucinations or delirium may look like altered awareness.

That is why describing the episode clearly is so helpful. Did the person lose awareness? Did one side of the body jerk? Were the eyes open? Was there tongue biting? Did they become confused afterward? How long did it last? Did it happen after standing up, missing sleep, changing medication, or getting sick? These details are medical gold.

Signs of a Seizure in Someone With Parkinson’s

Seizures do not always look like movie seizures. A person may not fall to the ground or shake dramatically. Some seizures are quiet and easy to miss, especially in older adults.

Possible seizure signs include:

• Sudden staring or blank expression
• Temporary confusion or inability to respond
• Lip-smacking, chewing motions, or picking at clothing
• Sudden jerking of an arm, leg, or one side of the face
• Unusual sensations, smells, tastes, or déjà vu
• Loss of consciousness or collapse
• Full-body stiffening and shaking
• Sleepiness, headache, muscle soreness, or confusion afterward

In Parkinson’s, it is especially important to separate seizures from tremor, dyskinesia, fainting, medication “off” periods, anxiety attacks, and sleep-related behaviors. A smartphone video, if it can be taken safely, can be extremely helpful for the medical team.

When to Seek Emergency Help

Call emergency services right away if a seizure lasts more than five minutes, if repeated seizures happen, if the person is injured, if breathing seems difficult, if the seizure happens in water, if the person is pregnant, if the person has diabetes, or if it is the person’s first known seizure.

During a seizure, stay calm, move dangerous objects away, gently turn the person on their side if they are lying down, and time the episode. Do not hold them down. Do not put anything in their mouth. The old myth about swallowing the tongue is as stubborn as a jar lid, but it is still a myth. Putting objects in the mouth can break teeth or cause choking.

How Doctors Evaluate Seizures in Parkinson’s Disease

If a person with Parkinson’s has a possible seizure, the clinician will usually start with a detailed history. They may ask what happened before, during, and after the episode. They will review medications, including Parkinson’s drugs, antidepressants, sleep medicines, antipsychotics, antibiotics, and any supplements.

Testing may include blood work to check electrolytes, glucose, kidney function, liver function, infection markers, and vitamin levels such as vitamin B6 when relevant. A brain MRI or CT scan may be used to look for stroke, bleeding, tumor, injury, or other structural causes. An EEG can measure electrical activity in the brain and may help detect patterns linked with epilepsy.

Treatment depends on the cause. Some people need anti-seizure medication. Others need correction of a metabolic problem, treatment of infection, adjustment of Parkinson’s medication, vitamin supplementation, or evaluation for fainting and blood pressure changes. The plan should be individualized because Parkinson’s patients often take several medications, and drug interactions are nobody’s idea of a fun weekend.

Can Parkinson’s Medications Trigger Seizures?

Most Parkinson’s medications do not commonly trigger seizures in most patients. However, medication effects are always worth reviewing when something new happens. Carbidopa/levodopa has received special attention because of the vitamin B6 deficiency warning. Dopamine agonists, MAO-B inhibitors, amantadine, anticholinergics, and other medications can also cause side effects such as hallucinations, confusion, sleepiness, dizziness, or impulse-control problems, which may muddy the waters.

The safest approach is not to stop medication suddenly unless a clinician says to. Sudden changes in Parkinson’s medication can worsen movement symptoms and may cause serious complications. Instead, bring a complete medication list to the doctor, including prescription drugs, over-the-counter products, vitamins, herbs, and “just one little sleep gummy” items that people often forget to mention.

Living With Parkinson’s and Seizure Concerns

If you or a loved one has Parkinson’s and a possible seizure occurs, the most useful first step is documentation. Write down the date, time, duration, what the person was doing, whether they had taken medication, whether they had eaten, whether they were sick, and what recovery looked like. Patterns can reveal clues.

Caregivers can also create a simple emergency plan. Keep medication lists updated. Know the person’s neurologist and pharmacy information. Ask the doctor what to do if another episode happens. If seizures are confirmed, ask whether rescue medication is needed and when emergency care is required.

For day-to-day prevention, the basics matter: sleep, hydration, fall prevention, medication timing, infection awareness, and regular follow-ups. These may sound boring, but boring is underrated in neurology. A calm routine is often better than a heroic rescue mission.

Experience-Based Insights: What Families Often Notice

Many Parkinson’s families describe the first possible seizure-like episode as confusing rather than obvious. One moment, the person is sitting at breakfast, and the next they are staring, not answering, or making small repetitive movements. It may last only a minute or two. By the time everyone decides whether to panic, the episode is over, and the person is tired, embarrassed, or unsure what happened.

That uncertainty is emotionally difficult. Parkinson’s already requires constant observation: Is the tremor worse today? Did the medication kick in? Why is walking harder after lunch? Add a possible seizure, and caregivers may feel like they have become part-time detectives with no training and too many sticky notes.

A practical experience many caregivers share is that details fade quickly. Right after an event, everyone thinks they will remember exactly what happened. Ten minutes later, the timeline becomes fuzzy. Was it 30 seconds or three minutes? Did the left hand jerk first or the right? Were the eyes open? Did the person speak afterward? Keeping a seizure diary, or even using a notes app, can turn a scary blur into useful information.

Another common experience is mistaking one Parkinson’s-related event for another. A freezing episode may look like sudden unresponsiveness. A blood pressure drop may cause fainting. Dyskinesia may look like uncontrolled movement. REM sleep behavior disorder may look frightening if someone thrashes or shouts during sleep. Families often feel relieved when a neurologist explains that not every strange episode is a seizure. Strange, yes. Automatically a seizure, no.

Medication timing can also shape the story. Some people notice episodes around dose changes, missed meals, dehydration, illness, or poor sleep. This does not prove cause and effect, but it gives the medical team a map. For example, if a person has an episode shortly after standing up, blood pressure may need evaluation. If episodes happen after medication increases, the doctor may review side effects. If confusion appears during a urinary tract infection, delirium may be part of the picture.

For people living with Parkinson’s, the emotional side matters too. A possible seizure can feel like one more thing Parkinson’s is trying to steal. Patients may become afraid to go out, shower alone, cook, or take walks. Care partners may hover, which is understandable but can feel suffocating. The goal is not to live in fear; it is to build a plan that makes daily life safer and calmer.

A helpful approach is to create a “just in case” routine. Keep pathways clear to reduce fall risk. Use shower chairs or grab bars when needed. Make sure the person wears medical identification if seizures are diagnosed. Share basic first-aid steps with family members. Ask the neurologist when to call 911. These steps do not make life perfect, but they make it less chaotic.

Perhaps the most important experience-based lesson is this: do not dismiss new episodes as “just Parkinson’s.” Parkinson’s can explain many symptoms, but it should not become a junk drawer diagnosis for every new change. Sudden confusion, collapse, jerking, staring spells, or unusual recovery deserves a medical conversation. Sometimes the answer is simple. Sometimes it is serious. Either way, guessing is not a treatment plan.

Conclusion

So, can Parkinson’s cause seizures? Parkinson’s disease is not usually a direct cause of seizures, and seizures are not considered a classic Parkinson’s symptom. However, people with Parkinson’s may have seizures because of overlapping risks such as age, dementia, stroke, infection, metabolic problems, medication complications, or vitamin B6 deficiency linked with carbidopa/levodopa treatment.

The smartest response to a possible seizure is calm attention. Record what happened, seek medical evaluation, review medications, and ask whether testing is needed. Parkinson’s is complicated enough without letting mystery episodes wander around unsupervised. With the right care team and a clear plan, patients and families can respond wisely instead of fearfully.